Pt3Ni@C Composite Material Designed and Prepared Based on Volcanic Catalytic Curve and Its High-Performance Static Lithium Polysulfide Semiliquid Battery

Ying Wang; Yao Yao; Yu Chen; Jiyue Hou; Zhicong Ni; Yanjie Wang; Xiuqiong Hu; Yanzhong Sun; Rui Ai; Yulin Xian; Yiyong Zhang; Xue Li; Yingjie Zhang; Jinbao Zhao

doi:10.3390/nano11123416

Pt₃Ni@C Composite Material Designed and Prepared Based on Volcanic Catalytic Curve and Its High-Performance Static Lithium Polysulfide Semiliquid Battery

Nanomaterials (Basel). 2021 Dec 16;11(12):3416. doi: 10.3390/nano11123416.

Authors

Ying Wang^{1

2}, Yao Yao¹, Yu Chen³, Jiyue Hou¹, Zhicong Ni¹, Yanjie Wang¹, Xiuqiong Hu², Yanzhong Sun³, Rui Ai⁴, Yulin Xian¹, Yiyong Zhang¹, Xue Li¹, Yingjie Zhang¹, Jinbao Zhao³

Affiliations

¹ National and Local Joint Engineering Laboratory for Lithium-Ion Batteries and Materials Preparation Technology, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China.
² College of Electrical Information Engineering, Panzhihua University, Panzhihua 617000, China.
³ State Key Laboratory of Physical Chemistry of Solid Surfaces, State-Province Joint Engineering Laboratory of Power Source Technology for New Energy Vehicle, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
⁴ College of Vanadium and Titanium, Panzhihua University, Panzhihua 617000, China.

Abstract

There are many challenges for the Static lithium polysulfide semiliquid battery in its commercial application, such as poor stability of the cathode material and further amplification of the lithium polysulfide shuttle effect. Therefore, this manuscript introduced a new type of Pt₃Ni@C composite material as cathode working electrode based on the principle of volcanic catalytic curve. Through symmetric battery test, CV, polarization curves and impedance test, it was found that Pt₃Ni@C composite material had good catalytic activity of lithium polysulfide to improve electrochemical kinetics. When the catholyte was Li₂S₈ and the charge-discharge voltage range was 1.8~2.6 V, the capacity maintained at approximately 550 mAh g^-1, and the coulombic efficiency maintained at approximately 95% after 100 cycles at a current rate of 0.5 mA cm^-2. The Pt₃Ni@C composite material is a potential cathode material with the specific capacity and long cycling stability of the static lithium polysulfide semiliquid battery.

Keywords: Pt3Ni@C; lithium polysulfide semiliquid battery; shuttle effect; volcanic catalytic curve.

Abstract

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