JPH0675402B2 - Method for preparing non-aqueous electrolyte - Google Patents
Method for preparing non-aqueous electrolyteInfo
- Publication number
- JPH0675402B2 JPH0675402B2 JP61232921A JP23292186A JPH0675402B2 JP H0675402 B2 JPH0675402 B2 JP H0675402B2 JP 61232921 A JP61232921 A JP 61232921A JP 23292186 A JP23292186 A JP 23292186A JP H0675402 B2 JPH0675402 B2 JP H0675402B2
- Authority
- JP
- Japan
- Prior art keywords
- lithium
- battery
- aqueous electrolyte
- aqueous
- electrolytic solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000011255 nonaqueous electrolyte Substances 0.000 title claims description 12
- 238000000034 method Methods 0.000 title claims description 7
- -1 sodium hexafluorophosphate Chemical compound 0.000 claims description 17
- 239000008151 electrolyte solution Substances 0.000 claims description 14
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 11
- 229910052744 lithium Inorganic materials 0.000 claims description 11
- 238000005868 electrolysis reaction Methods 0.000 claims description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 5
- 229910001416 lithium ion Inorganic materials 0.000 claims description 5
- 239000003960 organic solvent Substances 0.000 claims description 4
- 239000011356 non-aqueous organic solvent Substances 0.000 claims description 3
- 229910001415 sodium ion Inorganic materials 0.000 claims description 3
- 229910013870 LiPF 6 Inorganic materials 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 2
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000005486 organic electrolyte Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- WNXJIVFYUVYPPR-UHFFFAOYSA-N 1,3-dioxolane Chemical compound C1COCO1 WNXJIVFYUVYPPR-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910013684 LiClO 4 Inorganic materials 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- PNGLEYLFMHGIQO-UHFFFAOYSA-M sodium;3-(n-ethyl-3-methoxyanilino)-2-hydroxypropane-1-sulfonate;dihydrate Chemical compound O.O.[Na+].[O-]S(=O)(=O)CC(O)CN(CC)C1=CC=CC(OC)=C1 PNGLEYLFMHGIQO-UHFFFAOYSA-M 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- CFJRPNFOLVDFMJ-UHFFFAOYSA-N titanium disulfide Chemical compound S=[Ti]=S CFJRPNFOLVDFMJ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Primary Cells (AREA)
Description
【発明の詳細な説明】 〈産業上の利用分野〉 この発明は、ヘキサフルオロリン酸リチウムLiPF6を実
質的に溶質とする非水電解液を用いて構成される非水電
解液電池において、その非水電解液の調製方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a non-aqueous electrolyte battery constituted by using a non-aqueous electrolyte containing lithium hexafluorophosphate LiPF 6 as a solute. The present invention relates to a method for preparing a non-aqueous electrolyte solution.
〈従来の技術〉 非水電解液電池では、リチウムやナトリウム等のアルカ
リ金属やアルカリ土類金属を活物質とする負極と、二酸
化マンガンあるいはフッ化カーボンなどを活物質とする
正極合剤を備え、また電解液としては、プロピレンカー
ボネート、γ−ブチロラクトン、ジメトキシエタン、テ
トラヒドロフランなどの非水系の有機溶媒に、過塩素酸
リチウムやテトラフルオロホウ酸リチウムあるいはヘキ
サフルオロリン酸リチウムなどのアルカリ金属塩を溶質
として混合し溶解した非水電解液を用いた構成を採って
いる。<Prior Art> A non-aqueous electrolyte battery is provided with a negative electrode whose active material is an alkali metal or alkaline earth metal such as lithium or sodium, and a positive electrode mixture whose active material is manganese dioxide or fluorocarbon. Further, as the electrolytic solution, propylene carbonate, γ-butyrolactone, dimethoxyethane, tetrahydrofuran and other non-aqueous organic solvents, alkali metal salts such as lithium perchlorate or lithium tetrafluoroborate or lithium hexafluorophosphate as a solute It employs a configuration that uses a mixed and dissolved non-aqueous electrolyte.
上記の非水電解液に使用される溶質のうち、ヘキサフル
オロリン酸リチウムLiPF6は、イオン電導度が大きいの
でこれを用いた電解液では電池性能向上が図れ、また過
塩素酸リチウムLiClO4と比較して爆発などの危険がなく
て安全性が高いなどの特長があり、特に非水電解液二次
電池用の電解液の溶質として知られている。Among the solutes used in the above non-aqueous electrolyte, lithium hexafluorophosphate LiPF 6 has a large ionic conductivity, so an electrolyte using this can improve battery performance, and lithium perchlorate LiClO 4 and In comparison, it is characterized by high safety without danger of explosion and the like, and is especially known as a solute of an electrolytic solution for a non-aqueous electrolytic secondary battery.
〈発明が解決しようとする問題点〉 しかしながら、上記のヘキサフルオロリン酸リチウム
は、結局状態では極めて不安定で、常温でも次式のよ
うに徐々に分解を起こし、また微量でも水分が存在する
と及び式のように加水分解するという欠点がある。<Problems to be Solved by the Invention> However, the above lithium hexafluorophosphate is extremely unstable in the final state, gradually decomposes at room temperature as shown by the following equation, and even if a trace amount of water exists, It has the drawback of being hydrolyzed as in the formula.
（水が存在しない場合） LiPF6→LiF＋PF5 （水が存在する場合） LiPF6＋H2O→LiF＋POF3＋2HF POF3＋3H2O→H3PO4＋3HF 尚、ヘキサフルオロリン酸リチウム LiPF6は非水溶媒溶液中に溶解した状態では安定（約80
℃まで）である。(When water does not exist) LiPF 6 → LiF + PF 5 (when water exists) LiPF 6 + H 2 O → LiF + POF 3 ＋ 2HF POF 3 ＋ 3H 2 O → H 3 PO 4 ＋ 3HF Lithium hexafluorophosphate LiPF 6 is not Stable when dissolved in an aqueous solvent solution (approx. 80
Up to ° C).
このため、これを保存する場合、また有機溶媒に混合し
溶解する場合などにおいては、不活性雰囲気下等で保存
を行ない、また混合時の溶解熱による温度上昇を抑えつ
つ作業を行なう必要があり、その保存及び取扱いには厳
重な管理が必要となる。また、このように管理しても上
記の分解を完全に抑制することは事実上困難で、分解生
成物により電解液中の溶媒が重合するなどして電池性能
低下を招くという問題がある。Therefore, when it is stored, or when it is mixed and dissolved in an organic solvent, it is necessary to store it under an inert atmosphere or the like, and to perform the work while suppressing the temperature rise due to the heat of dissolution during mixing. , Strict control is required for its storage and handling. Further, even with such management, it is practically difficult to completely suppress the above decomposition, and there is a problem in that the decomposition product causes the solvent in the electrolytic solution to polymerize, resulting in deterioration of battery performance.
〈問題点を解決するための手段〉 この発明による非水電解液の調製方法は、非水電解液電
池に用いられる非水電解液を調製する際に、非水の有機
溶媒にヘキサフルオロリン酸ナトリウムを溶解し、次い
で、この有機溶媒中のナトリウムイオンをリチウムをア
ノードとした電気分解によってリチウムイオンに置換処
理するようにしたことを要旨とする。<Means for Solving Problems> The method for preparing a non-aqueous electrolytic solution according to the present invention is a method for preparing a non-aqueous electrolytic solution used in a non-aqueous electrolytic solution, wherein hexafluorophosphoric acid is used as a non-aqueous organic solvent. The gist is that sodium is dissolved, and then the sodium ion in the organic solvent is replaced with lithium ion by electrolysis using lithium as an anode.
〈作 用〉 上記手段を用いることで、ヘキサフルオロリン酸リチウ
ムを結晶状態で有機溶媒中に溶解させたのと実質的に同
じ組成の非水電解液が得られる。そしてこの場合、ヘキ
サフルオロリン酸ナトリウムの結晶は常温で安定で加水
分解も起さないため、ヘキサフルオロリン酸リチウムの
結晶を用いた場合のような上記分解が発生することはな
く、製作並びに取扱いが非常に容易となり、また上記分
解生成物による電池性能低下を抑制できる。<Operation> By using the above means, a non-aqueous electrolytic solution having substantially the same composition as that obtained by dissolving lithium hexafluorophosphate in a crystalline state in an organic solvent can be obtained. And in this case, since the crystals of sodium hexafluorophosphate are stable at room temperature and do not cause hydrolysis, the above-mentioned decomposition as in the case of using the crystals of lithium hexafluorophosphate does not occur, and the production and handling are performed. It becomes very easy and the deterioration of battery performance due to the above decomposition products can be suppressed.
〈実施例〉 蒸留精製した1,3-ジオキソランと1,2-ジメトキシエタン
とを容量比で1:1で混合した溶媒20ml（水分値30mg/）
に、ヘキサフルオロリン酸ナトリウムNaPF62.35g（0.7
モル濃度）を溶解して有機電解質を作った。この有機電
解質をテフロン製の容器内に電解液として入れ、また25
mm×15mmの大きさのリチウム板をアノードとして、また
同じ大きさのニッケル板をカソードとして用い、30mA
（電流密度8mA/cm2）の電流で19時間電気分解を行なっ
た。電気分解進行と共にリチウム板からはリチウムイオ
ンLi+が電解液中に溶出する一方、ニッケル板にはリチ
ウムに較べて還元電位の貴なナトリウムが優先的に電析
し、結局、電解液中ではナトリウムイオンNa+がリチウ
ムイオンLi+に置換される反応が生じた。尚、電解末期
にはかなりの量のリチウムがニッケル板上に共析するの
で、上記置換を充分におこなわせるには、理論値よりも
多くの電気量を通電して上記電気分解をする必要があ
る。この実施例の場合は理論値の150％の電気量を通電
させた。<Example> 20 ml of a solvent in which 1,3-dioxolane and 1,2-dimethoxyethane purified by distillation were mixed at a volume ratio of 1: 1 (water content 30 mg /)
, Sodium hexafluorophosphate NaPF 6 2.35 g (0.7
(Molar concentration) was dissolved to make an organic electrolyte. Put this organic electrolyte as an electrolyte in a Teflon container, and
Using a lithium plate of mm × 15mm as an anode and a nickel plate of the same size as a cathode, 30mA
Electrolysis was performed for 19 hours at a current of (current density 8 mA / cm 2 ). As the electrolysis progresses, lithium ions Li + are eluted from the lithium plate into the electrolytic solution, while sodium, which has a higher reduction potential than lithium, is preferentially electrodeposited on the nickel plate. A reaction occurred in which the ion Na + was replaced by the lithium ion Li + . In addition, since a considerable amount of lithium is codeposited on the nickel plate at the end of electrolysis, it is necessary to carry out the above electrolysis by applying a larger amount of electricity than the theoretical value in order to sufficiently perform the above substitution. is there. In the case of this example, 150% of the theoretical amount of electricity was applied.
そして、二硫化チタンTiS2と黒鉛とPTFE粉末とを重量比
で4:1:0.4の割合で混合しディスク状に加圧成形した正
極１を、ステンレスネット製の正極集電体２を介してSU
S304製の正極缶３の内底面に圧着し、また上記置換処理
をした電解液を正極１に120μ注入し吸液させるなど
して、第１図に示す直径20mm、高さ1.6mmの本発明電池
を組立てた。図中、４はプロピレン不織布製のセパレー
タ、５はリチウム負極、６はSUS304製の負極端子、７は
ポリプロピレン製の封口ガスケットである。Then, a positive electrode 1 obtained by mixing titanium disulfide TiS 2 , graphite and PTFE powder in a weight ratio of 4: 1: 0.4 and press-molded into a disk shape is passed through a positive electrode current collector 2 made of a stainless net. SU
The present invention having a diameter of 20 mm and a height of 1.6 mm shown in FIG. 1 is obtained by pressing the inner surface of an S304 positive electrode can 3 and injecting 120 μ of the above-mentioned substituted electrolytic solution into the positive electrode 1 to absorb the liquid. I assembled the batteries. In the figure, 4 is a separator made of propylene non-woven fabric, 5 is a lithium negative electrode, 6 is a negative electrode terminal made of SUS304, and 7 is a sealing gasket made of polypropylene.
一方、上記と同じ混合溶媒20mlに、市販のヘキサフルオ
ロリン酸リチウム2.13g（0.7モル濃度：アルゴン雰囲気
でテフロン容器内に密封して保管）を溶解して非水電解
液を調製し、これを用いた他は上記本発明電池と同一条
件で従来電池を作った。On the other hand, commercially available lithium hexafluorophosphate 2.13 g (0.7 molar concentration: sealed and stored in a Teflon container in an argon atmosphere) was dissolved in 20 ml of the same mixed solvent as above to prepare a non-aqueous electrolytic solution. A conventional battery was made under the same conditions as the battery of the present invention except that it was used.
これら本発明電池と従来電池とを夫々10セルずつ環境温
度60℃で保存し、その内部抵抗（RAC）の経時変化（そ
れぞれ10セルずつの平均値）を調べた。結果は第２図に
示した通りで、本発明電池は30日保存後も内部抵抗が４
割程度上昇しただけなのに対し、従来電池では30日経過
後は初期に較べて約５倍の内部抵抗を示した。Each of the battery of the present invention and the conventional battery was stored in an amount of 10 cells at an environmental temperature of 60 ° C., and changes in internal resistance (R AC ) with time (average value of 10 cells each) were examined. The results are shown in Fig. 2. The battery of the present invention has an internal resistance of 4 even after storage for 30 days.
In contrast, the conventional battery showed an internal resistance that was about 5 times that of the initial battery after 30 days, even though the internal resistance increased by about 30%.
従来電池でこのように内部抵抗の上昇が著しいのは、非
水電解液の溶質として使用したヘキサフルオロリン酸リ
チウムの結晶の一部が保管時あるいは溶媒へ溶解する時
などに分解し、この分解生成物の作用によって溶媒の一
部が保存中に重合して電解液粘度が上昇すると共に、こ
の分解生成物と負極のリチウムとが反応してリチウム負
極表面に不溶性の被膜が生成したことなどが主因と思わ
れる。そして、本発明電池ではこのような電解液粘度の
上昇及び被膜の生成の度合が僅かであるために内部抵抗
増大の度合が僅かで、保温特性が優れているものと考え
られる。In the conventional battery, such a significant increase in internal resistance is due to the fact that some of the crystals of lithium hexafluorophosphate used as a solute in the non-aqueous electrolyte decompose when stored or dissolve in a solvent. Due to the action of the product, a part of the solvent is polymerized during storage to increase the viscosity of the electrolytic solution, and the decomposition product reacts with lithium of the negative electrode to form an insoluble film on the surface of the lithium negative electrode. It seems to be the main cause. In the battery of the present invention, the degree of increase in the viscosity of the electrolyte and the degree of formation of the coating film are small, so that the degree of increase in internal resistance is small and the heat insulating property is considered to be excellent.
尚、本発明は一次並びに二次の非水電解液電池に適用で
きることは勿論である。Needless to say, the present invention can be applied to primary and secondary non-aqueous electrolyte batteries.
〈発明の効果〉 以上のように構成されるこの発明の非水電解液の調製方
法によれば、ヘキサフルオロリン酸リチウムLiPF6を実
質的に溶質として用いる非水電解液作製時の取扱性が向
上して電池製作が容易化すると共に、前記電解生成物の
生成が著しく抑えられて電池性能向上を図れるという効
果を奏する。また、ナトリウムイオンからリチウムイオ
ンへの置換処理を電気分解によって行なっているので、
金属析出時の副反応により液中の微量水分や不純物が除
去されるため、非水電解液の純度が高められる。<Effects of the Invention> According to the method for preparing a non-aqueous electrolytic solution of the present invention configured as described above, the handling property at the time of producing a non-aqueous electrolytic solution using lithium hexafluorophosphate LiPF 6 as a solute is substantially improved. As a result, it is possible to improve the production of the battery and facilitate the production of the battery. Further, it is possible to significantly suppress the production of the electrolytic product and improve the battery performance. Also, since the substitution process from sodium ions to lithium ions is performed by electrolysis,
Since a trace amount of water and impurities in the solution are removed by a side reaction during metal deposition, the purity of the non-aqueous electrolyte solution is increased.
【図面の簡単な説明】 第１図は実施例の電池の断面図、第２図は本発明電池と
従来電池の保存特性を示したグラフである。 １……正極、４……セパレータ、５……リチウム負極。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a battery of an example, and FIG. 2 is a graph showing storage characteristics of the battery of the present invention and a conventional battery. 1 ... Positive electrode, 4 ... Separator, 5 ... Lithium negative electrode.
Claims (1)
調製する際に、非水の有機溶媒にヘキサフルオロリン酸
ナトリウムを溶解し、次いで、この有機溶媒中のナトリ
ウムイオンをリチウムをアノードとした電気分解によっ
てリチウムイオンに置換処理することを特徴とする非水
電解液の調製方法。1. When preparing a non-aqueous electrolyte for use in a non-aqueous electrolyte battery, sodium hexafluorophosphate is dissolved in a non-aqueous organic solvent, and then sodium ions in the organic solvent are replaced with lithium. A method for preparing a non-aqueous electrolytic solution, which comprises subjecting a lithium ion to electrolysis to form an anode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61232921A JPH0675402B2 (en) | 1986-09-30 | 1986-09-30 | Method for preparing non-aqueous electrolyte |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61232921A JPH0675402B2 (en) | 1986-09-30 | 1986-09-30 | Method for preparing non-aqueous electrolyte |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6386357A JPS6386357A (en) | 1988-04-16 |
| JPH0675402B2 true JPH0675402B2 (en) | 1994-09-21 |
Family
ID=16946921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61232921A Expired - Fee Related JPH0675402B2 (en) | 1986-09-30 | 1986-09-30 | Method for preparing non-aqueous electrolyte |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0675402B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101748406B1 (en) * | 2009-08-07 | 2017-06-16 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | Manufacturing method for positive electrode active material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5987774A (en) * | 1982-11-10 | 1984-05-21 | Hitachi Maxell Ltd | Manufacture of solute for nonaqueous electrolyte |
-
1986
- 1986-09-30 JP JP61232921A patent/JPH0675402B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6386357A (en) | 1988-04-16 |
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