Study on solution strucuture and electrode passivation of organic electrolyte solution containging K salts
含K盐有机电解液的溶液结构及电极钝化研究
基本信息
- 批准号:20H02849
- 负责人:
- 金额:$ 11.07万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:2020
- 资助国家:日本
- 起止时间:2020-04-01 至 2025-03-31
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
2021年度までに,カリウムイオン含有の有機電解液と黒鉛電極の電気化学特性について調査を実施し,カリウム黒鉛層間化合物の相転移の解析を行った.特に,黒鉛電極へのカリウム挿入・脱離時の相転移について,オペランドX線回折を用いて,結晶構造,とくにステージ構造,結晶子,結晶欠陥の変化を詳細に調査した.黒鉛電極での調査結果を基に,新しく開発した電解液添加剤1,3,2-Dioxathiolane 2,2-Dioxideが金属カリウムの不動態化を促進し,安定な溶解析出反応を示すことを突き止め,その成果を活用することで,金属カリウムの表面前処理法を見出して,高分子固体電解質でのK半電池の作製法を確立し,プルシアンブルー系正極と黒鉛負極の二次電池作動に成功し,全固体カリウムイオン電池を初めて実証した.また,4ボルト作動が可能な正極材料KFeSO4Fについて,マグネシウムドーピングの効果を調査した.新しい電解液添加剤として,様々な検討の結果から,ジメチルスルファモイルフルオライドを見出した.この添加剤はFSAアニオンと部分構造が類似しており,黒鉛負極の不動態化に特に顕著な効果を示す上,電極反応の高速化にも有効であった.さらに蓄電デバイスとして利活用する際に重要となる正極での耐酸化性も十分に高いことから,カリウムイオン電池全体の寿命を大幅に改善することができる.以上の研究成果等を国際誌に発表した。2023年度は,これら黒鉛電極におていK挿入と Rb挿入反応の速度論的評価を進めると同時に,新たに希薄電極法を適用して定量的な理解を図り,キャリアイオンの違いが電池の電極反応速度に与える影響や,新しいカリウムインサーション材料の研究について検討に引き続き取り組む.
In 2021, the investigation of the electrochemical characteristics of organic electrolytes and lead electrodes contained in the system was carried out, and the phase transition analysis of lead interlayer compounds was carried out. In particular, the phase shift of the black lead electrode in the process of separation and separation, the use of X-ray reflection, the crystal structure, the crystal transformation are investigated in detail. Based on the investigation results of black lead electrode, a new electrolyte additive, 1,3,2-Dioxathiolane 2,2-Dioxide, was developed to promote the stabilization of metal ions, stabilize the dissolution and precipitation reaction, and to make use of the results. A surface pretreatment method for metal ions was discovered, and a method for manufacturing polymer solid electrolyte K half cells was established. The operation of secondary battery with black lead electrode was successful, and the operation of all-solid battery was successfully realized. The effect of the electrode material KFeSO4F on the electrode properties was investigated. New electrolyte additives are added to the solution, and the results of the investigation are shown. The addition of FSA is similar to the partial structure of the black lead electrode, and the effect of the non-dynamic electrode is shown. The acid resistance of the electrode is very high, and the life of the whole battery is greatly improved. The above research results are reported in international journals. In 2023, the evaluation of the velocity theory of the black lead electrode was carried out. Meanwhile, the new thin electrode method was applied to the quantitative understanding of the velocity of the electrode reaction of the battery.
项目成果
期刊论文数量(50)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Na3V2O2(PO4)2F3-2 as a stable positive electrode for potassium-ion batteries
- DOI:10.1016/j.jpowsour.2021.229676
- 发表时间:2021-05
- 期刊:
- 影响因子:9.2
- 作者:P. R. Kumar;K. Kubota;Y. Miura;Mirai Ohara;Kazuma Gotoh;S. Komaba
- 通讯作者:P. R. Kumar;K. Kubota;Y. Miura;Mirai Ohara;Kazuma Gotoh;S. Komaba
All-Solid-State Potassium Polymer Batteries Enabled by the Effective Pretreatment of Potassium Metal
- DOI:10.1021/acsenergylett.2c01096
- 发表时间:2022-06-08
- 期刊:
- 影响因子:22
- 作者:Hamada, Mizuki;Tatara, Ryoichi;Komaba, Shinichi
- 通讯作者:Komaba, Shinichi
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駒場 慎一其他文献
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{{ truncateString('駒場 慎一', 18)}}的其他基金
カリウム塩含有有機電解液の溶液構造と電極不動態被膜
含钾盐有机电解质溶液结构及电极钝化膜
- 批准号:
23K20280 - 财政年份:2024
- 资助金额:
$ 11.07万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
新奇イオン二次電池に関する研究
新型离子二次电池的研究
- 批准号:
21750194 - 财政年份:2009
- 资助金额:
$ 11.07万 - 项目类别:
Grant-in-Aid for Young Scientists (B)
微量金属イオン添加によるリチウムイオン二次電池負極の特性向上
添加微量金属离子改善锂离子二次电池负极特性
- 批准号:
14750649 - 财政年份:2002
- 资助金额:
$ 11.07万 - 项目类别:
Grant-in-Aid for Young Scientists (B)
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