Investigation of electrochemical kinetics for phosphate type cathode composited with nano carbon material

• Project/Area Number: 15H06193
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Device related chemistry
• Research Institution: Tokyo University of Agriculture and Technology
• Principal Investigator: Kisu Kazuaki 東京農工大学, 工学(系)研究科(研究院), 助教 (80755645)
• Project Period (FY): 2015-08-28 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: リチウムイオン二次電池 / 高出力エネルギーデバイス / リン酸鉄リチウム / ナノコンポジット

Outline of Final Research Achievements

To fabricate high power lithium ion battery, the electrochemical reaction mechanism during high rate charge and discharge process of lithium iron phosphate cathode material with high stability and reliability was evaluated using LFP/KB composite. The structure has double cores that contain a crystalline LFP (core 1) covered by an amorphous LFP (core 2), which are encapsulated by KB (shell). In the crystalline and amorphous LFP phase, different reaction mechanisms were observed and characterized by in-situ XAFS, in-situ XRD and GITT measurement. The diffusion coefficient of diffusivity of the amorphous LFP phase has up to 2 orders of magnitude higher than that of the crystalline LFP phase. These features explain the ultrafast performance of the material which offers interesting opportunities as a positive electrode for assembling high power and high energy hybrid supercapacitors.

Research Products

• [Int'l Joint Research] Institut des Materiaux Jean Rouxel/Universite Paul Sabatier Toulouse III(フランス)
• [Int'l Joint Research] University of Toulouse III Paul Sabatier/University of Nantes(France)
• [Journal Article] Electrochemical kinetics of nanostructure LiFePO4/graphitic carbon electrodes (2016)
  • Author(s): Kazuaki Kisu, Etsuro Iwama, Wako Naoi, Patrice Simon, Katsuhiko Naoi
  • Journal Title: Electrochemistry Communications Volume: 72 Pages: 10-14
  • DOI: 10.1016/j.elecom.2016.08.013
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Ultrafast charge-discharge characteristics of a nanosized core-shell structured LiFePO4 material for hybrid supercapacitor applications (2016)
  • Author(s): Katsuhiko Naoi, Kazuaki Kisu, Etsuro Iwama, Shota Nakashima, Yuki Sakai, Yuki Orikasa, Philippe Leone, Nicolas Dupre, Thierry Brousse, Patrick Rozier, Wako Naoi, Patrice Simon
  • Journal Title: Energy and Envionmental Science Volume: 9 Issue: 6 Pages: 2143-2151
  • DOI: 10.1039/c6ee00829a
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Enhanced Electrochemical Performance of Ultracentrifugation-Derived nc-Li3VO4/MWCNT Composites for Hybrid Supercapacitors (2016)
  • Author(s): Etsuro Iwama, Nozomi Kawabata, Nagare Nishio, Kazuaki Kisu, Junichi Miyamoto, Wako Naoi, Patrick Rozier, Patrice Simon, Katsuhiko Naoi
  • Journal Title: ACS Nano Volume: 10 Issue: 5 Pages: 5398-5404
  • DOI: 10.1021/acsnano.6b01617
  • Peer Reviewed / Int'l Joint Research
• [Presentation] Ultrafast Carbon-Nested LiFePO4 Core-Shell Structured Nanomaterial for Hybrid EES (2017)
  • Author(s): Kazuaki Kisu, Etsuro Iwama, Yuki Orikasa, Philippe Leone, Nicolas Dupre, Thierry Brousse, Patrick Rozier, Patrice Simon, Wako Naoi and Katsuhiko Naoi
  • Organizer: 5 th International Symposium on Enhanced Electrochemical Capacitors
  • Place of Presentation: Jena, Germany
  • Year and Date: 2017-07-10
  • Int'l Joint Research
• [Presentation] ハイブリッドキャパシタ用正極材料に向けた ナノLiFePO4/カーボン三層コアシェル複合体の作製と電気化学評価 (2017)
  • Author(s): 木須一彰, 岩間悦郎, 酒井祐輝, 折笠有基, 直井和子, Thierry Brousse, Patrick Rozier, Patrice Simon, 直井勝彦
  • Organizer: 電気化学会第84回大会
  • Place of Presentation: 首都大学東京, 東京, 日本
  • Year and Date: 2017-03-25
• [Presentation] Electrochemical Kinetics of Carbon-Nested Ultrafast nano-LiFePO4 for Hybrid EES (2016)
  • Author(s): Kazuaki Kisu, Etsuro Iwama, Yuki Sakai, Yuki Orikasa, Philippe Leone, Nicolas Dupre, Thierry Brousse, Patrick Rozier, Patrice Simon, Wako Naoi and Katsuhiko Naoi
  • Organizer: PRiME 2016/230th ECS Meeting
  • Place of Presentation: Hawaii, USA
  • Year and Date: 2016-10-02
  • Int'l Joint Research
• [Presentation] Ultrafast Carbon-Nested LiFePO4 Core-Shell Structured Nanomaterial Prepared by Ultracentrifugation (2016)
  • Author(s): Kazuaki Kisu, Etsuro Iwama, Shota Nakashima, Yuki Sakai, Yuki Orikasa, Philippe Leone, Nicolas Dupre, Thierry Brousse, Patrick Rozier, Patrice Simon, Wako Naoi and Katsuhiko Naoi
  • Organizer: ICAC2016 5th International Conference on Advanced Capacitors
  • Place of Presentation: プリンスホテル, 滋賀, 日本
  • Year and Date: 2016-05-23
  • Int'l Joint Research
• [Presentation] Ultrafast Carbon-Nested LiFePO4 Core-Shell Structured Nanomaterial Prepared by Ultracentrifugation (2016)
  • Author(s): Kazuaki Kisu, Etsuro Iwama, Shota Nakashima, Yuki Sakai, Yuki Orikasa, Philippe Leone, Nicolas Dupre, Wako Naoi, Thierry Brousse, Patrick Rozier, Patrice Simon, and Katsuhiko Naoi
  • Organizer: The 2016 International Conference on Advanced Capacitors
  • Place of Presentation: 滋賀県大津市におの浜
  • Year and Date: 2016-05-23
  • Int'l Joint Research
• [Presentation] Detailed Analysis on Carbon-Nested Ultrafast nano-LiFePO4 Prepared by Ultracentrifugation for Hybrid EES (2015)
  • Author(s): Kazuaki Kisu, Etsuro Iwama, Shota Nakashima, Yuki Sakai, Yuki Orikasa, Philippe Leone, Nicolas Dupre, Wako Naoi, Thierry Brousse, Patrick Rozier, Patrice Simon, and Katsuhiko Naoi
  • Organizer: The 56th Battery Symposium Japan (International Session)
  • Place of Presentation: 愛知県名古屋市中村区名駅
  • Year and Date: 2015-11-11
• [Presentation] Detailed Analysis on Carbon-Nested Ultrafast nano-LiFePO4 Prepared by Means of Ultracetrifugation for Hybrid EES (2015)
  • Author(s): Kazuaki Kisu, Etsuro Iwama, Shota Nakashima, Yuki Sakai, Yuki Orikasa, Philippe Leone, Nicolas Dupre, Wako Naoi, Thierry Brousse, Patrick Rozier, Patrice Simon, and Katsuhiko Naoi
  • Organizer: 66th annual meeting of International Electrochemical Society
  • Place of Presentation: Taipei, Taiwan
  • Year and Date: 2015-10-04
  • Int'l Joint Research