Impact of pH on Morphology and Electrochemical Performance of LiFePO₄ as Cathode for Lithium-ion Batteries

Xinru ZhaoKey Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun, 130022, China

Jinxian WangState Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, CAS, Changchun, 130022, ChinaCorrespondence[email protected] [email protected]

Xiangting DongCorrespondence[email protected] [email protected]

Xinlu WangKey Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun, 130022, China

Guixia LiuKey Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun, 130022, China

Wensheng YuKey Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun, 130022, China

Limin WangState Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, CAS, Changchun, 130022, China

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Abstract

Lithium-ion battery cathode material LiFePO₄ particles were synthesized by sol-gel method. The impact of pH value on morphology and electrochemical performance of LiFePO₄ particles have been investigated. Results show that as pH value increased, the particle sizes of LiFePO₄ are reduced, and its particle sizes distribution are narrowed. The LiFePO₄ particles synthesized with a high pH value contains hierarchically organized pores, yielding a high discharge capacity of 129.02 mAh/g at 0.2 C and a stable capacity retention of 91.71% until 20 electrochemical cycles.

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Impact of pH on Morphology and Electrochemical Performance of LiFePO₄ as Cathode for Lithium-ion Batteries

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Impact of pH on Morphology and Electrochemical Performance of LiFePO₄ as Cathode for Lithium-ion Batteries