Preparation of high capacity positive electrode active material using new synthesis of functional organic sulfur compounds.

2016 Fiscal Year Final Research Report

• Project/Area Number: 26288091
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Energy-related chemistry
• Research Institution: Yonago National College of Technology
• Principal Investigator: TANIFUJI Naoki 米子工業高等専門学校, その他部局等, 准教授 (80423549)
• Co-Investigator(Kenkyū-buntansha): 吉川 浩史 関西学院大学, 理工学部, 准教授 (60397453)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: リチウム二次電池 / 正極活物質 / カーボンナノチューブ / ジスルフィド / 無溶媒反応

Outline of Final Research Achievements

Disulfide compounds have attracted much attention as energy storage material whereby energy exchange occurs according to a reversible bonding construction/cleavage process, accompanied with two-electrons redox reaction. This redox couple can be suitably used for the cathode of high energy density lithium secondary batteries. The theoretical capacity is larger than that of the conventional battery materials. So far, various disulfide materials have been applied to the battery, but the cycle performance is low in spite of high capacities since they show structural changes and dissolution into the electrolyte, depending on an applied potential during electrochemical reaction. To prevent the dissolution of disulfide active materials, it is important to increase the interaction with conductive carbon in the cathode. Here we report syntheses of such disulfide compounds and their battery performances as cathode active materials.

Free Research Field

有機化学