Effect of Organic Carbon Source on Performance of LiTi2(PO4)3/C Composite Electrodes in Aqueous Solutions †

doi:10.7503/cjcu20190624

Chem. J. Chinese Universities ›› 2020, Vol. 41 ›› Issue (6): 1352.doi: 10.7503/cjcu20190624

• Physical Chemistry • Previous Articles Next Articles

Effect of Organic Carbon Source on Performance of LiTi₂(PO₄)₃/C Composite Electrodes in Aqueous Solutions ^†

ZHANG Chenyang^1,²,WEN Yuehua^2,^*(),ZHAO Pengcheng²,CHENG Jie²,QIU Jingyi²,SUN Yanzhi^1,^*()

^1. National Fundamental Research Laboratory of New Hazardous Chemicals Assessment and Accident Analysis, Beijing University of Chemical Technology, Beijing 100029, China
^2. Research Institute of Chemical Defense Institution, Beijing 100191, China

Received:2019-12-03 Online:2020-06-10 Published:2020-04-08
Contact: Yuehua WEN,Yanzhi SUN E-mail:wen_yuehua@126.com;sunyz@mail.buct.edu.cn
Supported by:
† National Key Research and Development Program of China(SQ2016YFGX100026)

Abstract

Abstract:

Spherical LiTi₂(PO₄)₃/C composites were prepared through spray drying method followed by high-temperature calcination and used as anodes for aqueous lithium ion batteries. The effect of different organic carbon source based on different coating mechanisms and carbon content on the electrochemical properties of LiTi₂(PO₄)₃/C composite anodes were investigated. Results show that if the amount of carbon coating is too low, it cannot prevent water from eroding. In contrast, if the amount of carbon coating is too high, the resis-tance of lithium ion diffusion will be high. So the optimal carbon coating amount of LiTi₂(PO₄)₃/C electrodes is 13%. The uniformity of carbon coating and the thickness of coating layer are the two main factors affecting the performance of coated electrodes. The polydopamine-coated lithium titanium phosphate particles based on the in-situ polymerization coating mechanism are the most uniform, and the microcrystalline structure and electronic conductivity after carbonization is better. The best performance is achieved by LiTi₂(PO₄)₃/C anodes prepared by using polydopamine as the carbon source.

Key words: Aqueous lithium ion battery, Spray drying method, LiTi₂(PO₄)₃/C composite, Organic carbon source

CLC Number:

O646

TrendMD:

ZHANG Chenyang,WEN Yuehua,ZHAO Pengcheng,CHENG Jie,QIU Jingyi,SUN Yanzhi. Effect of Organic Carbon Source on Performance of LiTi₂(PO₄)₃/C Composite Electrodes in Aqueous Solutions ^†[J]. Chem. J. Chinese Universities, 2020, 41(6): 1352.

Figures/Tables 14

References 23

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Carbon source	Variation of voltage/mV
Carbon source	1st	100th	200th
PDA	110	73	81
PF	115	85	88
PAN	104	85	89
GLC	108	95	80

Carbon source	Variation of voltage/mV
Carbon source	1st	100th	200th
PDA	110	73	81
PF	115	85	88
PAN	104	85	89
GLC	108	95	80

Effect of Organic Carbon Source on Performance of LiTi₂(PO₄)₃/C Composite Electrodes in Aqueous Solutions ^†

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