Studies on Electrochemical Magnesium Storage/release Properties in Carbonate Ester-based Electrolyte Solutions

• Project/Area Number: 16K05959
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Device related chemistry
• Research Institution: Doshisha University
• Principal Investigator: Doi Takayuki 同志社大学, 理工学部, 准教授 (30404007)
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 二次電池 / 高容量正極 / 微粒子合成 / マグネシウム

Outline of Final Research Achievements

To achieve the practical use of high-energy density magnesium secondary batteries, we developed carbonate ester-based electrolyte solutions and positive electrode system. The resultant ester-based electrolyte solutions enabled repeated charge/discharge cycles of a magnesium negative-electrode and Mo6S8- and MnO2-positive-electrodes. Nano-sized MoS2 particles, which were synthesized by a heating reflux method, delivered a high specific capacity of about 180 mAh g-1.

Academic Significance and Societal Importance of the Research Achievements

リチウムイオン二次電池のエネルギー密度を凌駕するマグネシウム二次電池を実用化するために、本研究ではマグネシウム負極に適合するエステル系電解液を開発し、正極材料開発の突破口を開く。これによりマグネシウム二次電池の研究開発基盤を大幅に拡大させることが可能になるため大きな意義があり、また、マグネシウムのイオニクスに新たな展開をもたらすことができるため学術面での波及効果も大きい。

Research Products

• [Presentation] Electrochemical Properties of Nano-Sized MoS2 Positive-Electrodes in Ester-Based Electrolyte Solutions for Magnesium Rechargeable Batteries (2019)
  • Author(s): Kohei Mishima, Takayuki Doi, Minoru Inaba
  • Organizer: International Battery Association 2019
  • Int'l Joint Research
• [Presentation] Development of Magnesium Rechargeable Batteries with Propylene Carbonate Ester-based Electrolyte Solution (2018)
  • Author(s): Masashi Masumoto, Takayuki Doi, Minoru Inaba
  • Organizer: International Battery Association 2018
  • Int'l Joint Research
• [Presentation] GBL-based Electrolyte Solutions for Magnesium Rechargeable Batteries (2018)
  • Author(s): Kohei Mishima, Masashi Masumoto, Takayuki Doi, Minoru Inaba
  • Organizer: International Battery Association 2018
  • Int'l Joint Research
• [Presentation] GBL-based Electrolyte Solutions for Magnesium Rechargeable Batteries (2018)
  • Author(s): Kohei Mishima, Masashi Masumoto, Takayuki Doi, and Minoru Inaba
  • Organizer: International Battery Association 2018
  • Int'l Joint Research
• [Presentation] Development of Ester-Based Electrolyte Solution for Electrochemical Deposition/Dissolution of Magnesium (2017)
  • Author(s): Masashi Masumoto, Takayuki Doi, Minoru Inaba
  • Organizer: The 9th Asian Conference on Electrochemical Power Sources 2017
  • Int'l Joint Research
• [Presentation] 酢酸塩を用いたマグネシウム二次電池用エステル系電解液の開発 (2016)
  • Author(s): 杉田 美樹、土井 貴之、稲葉 稔
  • Organizer: 第57回電池討論会
  • Place of Presentation: 幕張メッセ、千葉
  • Year and Date: 2016-11-29
• [Presentation] The development of ester-based electrolyte solutions for magnesium rechargeable batteries (2016)
  • Author(s): Miki Sugita, Takayuki Doi, Minoru Inaba
  • Organizer: PRiME2016
  • Place of Presentation: Honolulu, HI, USA
  • Year and Date: 2016-10-02
  • Int'l Joint Research
• [Patent(Industrial Property Rights)] マグネシウム二次電池用電解液およびそれを用いたマグネシウム二次電池 (2017)
  • Inventor(s): 土井貴之、稲葉稔、増本将士
  • Industrial Property Rights Holder: 土井貴之、稲葉稔、増本将士
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2017-104046
  • Filing Date: 2017