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Conversion Materials for Rechargeable Batteries

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Front. Chem. | doi: 10.3389/fchem.2019.00379

Spray-drying synthesis of LiFeBO3/C hollow spheres with improved electrochemical and storage performances for Li-ion batteries

Yulei Sui1, Wei Chen1, Shibao Tang1,  Ling Wu1*, Binjue Wang1, Huacheng Li2, Wei Li3 and  Shengkui Zhong1*
  • 1Soochow University, China
  • 2Citic Dameng Mining Industries Limited, China
  • 3Guilin University of Technology, China

LiFeBO3/C cathode material with hollow sphere architecture is successfully synthesized by a spray-drying method. SEM and TEM results demonstrate that the micro-sized LiFeBO3/C hollow spheres consist of LiFeBO3@C particles and the average size of LiFeBO3@C particles is around 50-100 nm. The thickness of the amorphous carbon layer which is coated on the surface of LiFeBO3 nanoparticles is about 2.5 nm. LiFeBO3@C particles are connected by carbon layers and formed conductive network in the LiFeBO3/C hollow spheres, leading to improved electrical conductivity. Meanwhile, the hollow structure boosts the Li+ diffusion and the carbon layers of LiFeBO3@C particles protect LiFeBO3 from moisture corrosion. Consequently, synthesized LiFeBO3/C sample exhibits good electrochemical properties and storage performance.

Keywords: Li-ion batteries, LiFeBo3, Hollow Sphere, Cathode materials, Spray drying

Received: 29 Mar 2019; Accepted: 09 May 2019.

Edited by:

Juchen Guo, University of California, Riverside, United States

Reviewed by:

Qiaobao Zhang, Xiamen University, China
Biao Gao, Wuhan University of Science and Technology, China  

Copyright: © 2019 Sui, Chen, Tang, Wu, Wang, Li, Li and Zhong. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence:
Mx. Ling Wu, Soochow University, Suzhou, 215000, Jiangsu Province, China, lwu@suda.edu.cn
Prof. Shengkui Zhong, Soochow University, Suzhou, 215000, Jiangsu Province, China, zsk_suda@163.com