阳极
假电容
材料科学
电化学
复合数
锂(药物)
化学工程
石墨
碳纤维
电极
复合材料
化学
超级电容器
内分泌学
物理化学
工程类
医学
作者
Yangyang Liu,Bo Li,Mengqi Zhang,Yupeng Zhang,He Zhu,Ni Xue,Ji Zhuang,Xiangyan Zhao,Xutang Tao
标识
DOI:10.1016/j.electacta.2021.138469
摘要
Li2TiSiO5 has been proposed as a practical anode material for lithium-ion batteries with an ideal operational potential of 0.28 V vs. Li/Li+ which can fill the voltage region between graphite and Li4Ti5O12. Herein, soft carbon-combined Li2TiSiO5 composite with extra oxygen vacancies is successfully prepared through a one-pot process. When employed as an anode material for lithium-ion batteries, the novel Li2TiSiO5/C composite delivers a high initial discharge capacity of 443 mA h g−1 at a current density of 100 mA g−1, and presents a reversible capacity of 165 mA h g−1 even at 1600 mA g−1. The long-life cycling is achieved with a capacity retention of 273 mA h g−1 after 1500 cycles under 500 mA g−1 between 0.1 V and 3.0 V. The enhanced cycling stability and prominent rate capability are largely ascribed to the improved conductivities, faster electrochemical reaction kinetics and strong pseudocapacitance effect. This superior lithium-storage performance provides a new opportunity for the further practical applications of novel titanium-based carbon composites as electrode materials in high-power storage devices.
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