Fabrication of Li4Ti5O12@CN Composite With Enhanced Rate Properties
Fabrication of Li4Ti5O12@CN Composite With Enhanced Rate Properties
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具有增强倍率性能的Li4Ti5O12@CN复合材料的制备
DOI:
10.3389/fchem.2019.00432
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发表时间:
2019-06
影响因子:
5.5
通讯作者:
Shibiao Zhou
中科院分区:
文献类型:
--
作者:
Hui Xiao;Xiaobing Huang;Yurong Ren;Xiang Ding;Shibiao Zhou
Folic acid is first time applied as a carbon-nitrogen precursor to fabricate Li4Ti5O12@CN composites via ball milling Nano-TiO2, Li2CO3 and folic acid with ethanol as solvent, and then followed by heating treatment in argon. XRD, SEM, TEM, XPS, charge-discharge test and EIS are used to evaluate the influence of N-doped carbon coating on its structure, morphologies and electrochemical property. It is demonstrated that the N-doped carbon coated Li4Ti5O12 composite exhibits superior high-rate performance compared with pure Li4Ti5O12. It possesses a high discharge capacity of 174, 165 mAh g−1 at 0.5 and 10 C, respectively. Additionally, an initial specific capacity of 96.2% is obtained after 200 cycles at 10 C. The remarkable performance might be put down to the N-doped carbon layer providing efficiently electron conductive network and nanosized decreasing lithium ion diffusion path.
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