Preparation and Properties of Novel Catalysts for Rechargeable Na/CF<sub><em>x</em></sub> Batteries

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Abstract Similar to lithium/fluorocarbon (Li/CF_x) battery, sodium/fluorocarbon (Na/CF_x) battery has low price and high energy density, so it is an ideal alternative for lithium-ion battery in the future. Nevertheless, the battery has some problems needing to be resolved until now, such as high polarization and poor cycle performance. In order to solve the above problems, the addition of catalysts in CF_x cathode is an important way to improve the electrochemical performance of cells. In this paper, the catalyst materials of Co₃O₄-TiO₂ and ZrO₂ have been prepared by the hydrothermal and sol-gel methods, respectively, which are characterized subsequently. Four catalyst materials of TiO₂ Co₃O₄, Co₃O₄-TiO₂ and ZrO₂ are added into the positive electrode of CF_x at the mass ratio of 10%, and then are assembled into the batteries, respectively. The electrochemical performances of these batteries are tested by way of constant current charge, discharge impedance and cyclic voltammetry. The experimental results show that the discharge specific capacity of Na/CF_x batteries has been increased significantly after the addition of catalysts. Among these catalysts, ZrO₂ catalyst reveals the best catalytic performance. The cycle performance of Na/CF_x battery has been increased after addition of ZrO₂ catalyst, and the specific discharge capacity of the Na/CF_x battery may reach 167.3 mAh·g^-1 after 100 cycles.

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	Articles by authors
	Liu Ziyang
	Zhong Xueqi
	Zhang Shuoqing
	Ding Fei
	Liu Xingjiang
	Xu Qiang

Keywords： Na/CF_x battery； catalysts； polarization； transition metal oxide； cyclic performance

Received 2019-07-10;

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Liu Ziyang, Zhong Xueqi, Zhang Shuoqing, Ding Fei, Liu Xingjiang, Xu Qiang.Preparation and Properties of Novel Catalysts for Rechargeable Na/CF_x Batteries[J] Chemcial Industry and Engineering, 2020,V37(5): 64-71,79

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