Effects of carbon sources on electrochemical performance of Li4Ti5O12/C composite anode materials |
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Authors: | Ping Liu Zhi-an Zhang Jie Li and Yan-qing Lai |
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Affiliation: | (1) Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, and State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, China; |
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Abstract: | Li4Ti5O12/C composite materials were synthesized by two-step solid state reaction method with glucose, sucrose, and starch as carbon
sources, respectively. The effects of carbon sources on the structure, morphology, and electrochemical performance of Li4Ti5O12/C composite materials were investigated by SEM, XRD and electrochemical tests. The results indicate that carbon sources have
almost no effect on the structure of Li4Ti5O12/C composite materials. The initial discharge capacities of the Li4Ti5O12/C composite materials are slightly lower than those of as-synthesized Li4Ti5O12. However, Li4Ti5O12/C composite materials show better electrochemical rate performance than the as-synthesized Li4Ti5O12. The capacity retention (79%) of the Li4Ti5O12/C composite materials with starch as carbon source, is higher than that of Li4Ti5O12/C composite materials with glucose and sucrose as carbon source at current rate of 2.0C. |
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