Preparation and Electrochemical Performance of a New Type of Nitrogen-Containing Heterocycle Loaded Cobalt Electrode Material for Lithium-Ion Battery

Abstract

Abstract: Lithium-ion batteries with the characteristics of high working voltage, high energy density, low self-discharge rate, and no memory effect, have become an indispensable energy storage technology in the future. A kind of organic-inorganic hybrid material HAT-Co, which is similar to MOF structure with dual active sites, has been successfully synthesized. The material is first used as an anode material for the lithium-ion batteries. The material has a coral shape when it is analyzed by the SEM topography. By comparing several different synthesis conditions, the XRD diffraction peaks are basically unchanged and the crystallinity is good. In the case of a current density of 100mA/g, a large capacity of 698mAh/g can be reached after 50 cycles. After 500 cycles at a current density of 800mA/g, the capacity retention rate of 95% can still be maintained. The excellent electrochemical performance of HAT-Co electrode material is mainly due to its unique structure and dual active redox active sites. The synthesis and application of this material have theoretical guiding significance for breaking through the bottleneck of lithium-ion battery research, and have practical application value for promoting the development of new electrode systems.

Key words: high nickel layered oxide, lithium-ion battery, ion doping, surface coating

CLC Number:

TQ11

ZHENG Jiayu, YANG Runfang, YAO Shiwen, CAI Yuqing, SHU Bo, XIA Shubiao. Preparation and Electrochemical Performance of a New Type of Nitrogen-Containing Heterocycle Loaded Cobalt Electrode Material for Lithium-Ion Battery[J]. Journal of Qujing Normal University, 2020, 39(6): 9-14.

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