Electrochemical performance of Li4Ti5O12 anode material synthesised using polyethylene glycol as a template agent
Electrochemical performance of Li4Ti5O12 anode material synthesised using polyethylene glycol as a template agent
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聚乙二醇作为模板剂合成的Li4Ti5O12负极材料的电化学性能
DOI：
10.1016/j.ceramint.2020.10.042
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发表时间：
2020-10
影响因子：
5.2
通讯作者：
Xu Ben Jun
中科院分区：
文献类型：
--
作者：
Zhang Lu;Zhang Jian Dong;Luo Xian;Long Yong Fu;Xue Xin;Yin Yue;Xu Ben Jun
容量和倍率性能低是制约Li 4 Ti 5 O 12（LTO）发展的重要因素。添加适量的聚乙二醇（PEG）是提高LTO负极材料容量和倍率性能的有效方法。本研究以聚乙二醇为模板剂，采用溶胶-凝胶法合成了LTO负极材料。X射线衍射（XRD）结果表明，PEG的加入提高了材料的结晶度，并保留了LTO的尖晶石晶格类型。扫描电子显微镜（SEM）结果表明，添加适量的聚乙二醇可以促进形成更均匀、更细小的形态。高分辨透射电子显微镜（HRTEM）的结果表明，聚乙二醇的材料具有良好的结晶性。充放电数据验证了PEG的加入可以改善材料的电化学性能。P2-LTO具有更小的颗粒尺寸、最大的容量、最好的循环性能和最好的倍率性能。P2-LTO在0.2C下的容量可达224.3 mAgh-1，远高于LTO的理论比容量（175 mAgh-1）。P2-LTO在10 C下第一次循环的放电容量为178.9 mAgh−1。循环伏安法和电化学阻抗谱的结果表明，P2-LTO的电极极化和电化学阻抗均低于纯LTO。通过在LTO体系中加入PEG作为模板剂，可以获得更好的容量和速率性能。这是制备高性能LTO负极材料的一种简单有效的方法。
Low capacity and rate performance are important factors restricting the development of Li4Ti5O12(LTO). The addition of an appropriate amount of polyethylene glycol (PEG) is an effective method to increase the capacity and rate performance of LTO anode material. In this study, LTO anode material was synthesised by the sol–gel method using PEG as a template agent. X-ray diffraction (XRD) results show that the addition of PEG can improve the crystallinity of the material and retain the spinel lattice type of LTO. Scanning electron microscopy (SEM) results show that the addition of an appropriate amount of PEG can promote the formation of a more uniform and much finer morphology. The results of high-resolution transmission electron microscopy (HRTEM) show that the material with PEG had good crystallinity. The charge and discharge data verify that the electrochemical performance of the material could be improved by adding PEG. P2-LTO exhibits a smaller particle size, largest capacity, best cycling performance and best rate performance. The capacity of P2-LTO at 0.2C can reach 224.3 mAgh−1, which is much higher than the theoretical specific capacity of LTO (175 mAgh−1). The discharge capacity of P2-LTO in the first cycle at 10C is 178.9 mAgh−1. The results of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) show that the electrode polarisation and electrochemical impedance of P2-LTO were lower than that of pure LTO. Better capacity and rate performance can be obtained by adding PEG as a template agent to a LTO system. It is a simple and effective method to produce high-performance LTO anode materials.
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影响因子：
3.2
作者：
Lishuang Xu;Junxia Meng;P. Yang;Huai-zhe Xu;Shichao Zhang
通讯作者：
Lishuang Xu;Junxia Meng;P. Yang;Huai-zhe Xu;Shichao Zhang
影响因子：
17.6
作者：
Liao, Jin-Yun;Chabot, Victor;Chen, Zhongwei
通讯作者：
Chen, Zhongwei
影响因子：
6.6
作者：
N. Cao;Z. Song;Qiu Liang;Xuejiao Gao;X. Qin
通讯作者：
N. Cao;Z. Song;Qiu Liang;Xuejiao Gao;X. Qin
DOI：
10.1016/j.matpr.2019.03.188
发表时间：
2019
期刊：
Materials Today: Proceedings
影响因子：
--
作者：
I. Nuroniah;S. Priyono;A. Subhan;B. Prihandoko;A. Suhandi;Ahmad Sohib
通讯作者：
I. Nuroniah;S. Priyono;A. Subhan;B. Prihandoko;A. Suhandi;Ahmad Sohib
影响因子：
6.6
作者：
H. Ming;Jun Ming;Xiaowei Li;Qun Zhou;Haohe Wang;Lingling Jin;Yue Fu;J. Adkins;Junwei Zheng
通讯作者：
H. Ming;Jun Ming;Xiaowei Li;Qun Zhou;Haohe Wang;Lingling Jin;Yue Fu;J. Adkins;Junwei Zheng