Wei Wu , Ranlu Zheng , Yixuan Bai , Qingyi Feng , Bo Li , Yongliang Tang , Hongxiang Deng , Xiaotao Zu , Shuangyue Wang , Xia Xiang
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引用次数: 0
Abstract
Graphene-based lithium-ion batteries suffer from the poor initial coulombic efficiency and low mass loading. A convenient method is proposed to replenish the Li loss in the first cycle and improve the cycling stability of high mass loading batteries simultaneously in this work. Graphene is modified by introducing LiCl (G/LC) through a wet ball-milling process, which leads to the formation of hybrid solid electrolyte interface. As a result, the half-cells based on high mass loading G/LC electrodes exhibit obviously improved initial coulombic efficiency (>90 %) and high areal specific capacity of 2.53 mAh cm−2 at high current density of 0.55 mA cm−2. Furthermore, the full-cells based on G/LC anode paired with LiNi6Mn2Co2O2 cathode deliver a high initial coulombic efficiency of 76.7 %, as well as a high-capacity retention of 97.52 % after 200 cycles, suggesting the potential application of this extend strategy for rechargeable batteries.
石墨烯基锂离子电池存在初始库仑效率差和质量负载低的问题。本文提出了一种简便的方法来补充第一次循环的锂损失,同时提高高质量负载电池的循环稳定性。通过湿球磨工艺引入LiCl (G/LC)修饰石墨烯,形成杂化固体电解质界面。结果表明,基于高质量负载G/LC电极的半电池在0.55 mA cm - 2的高电流密度下,具有明显提高的初始库仑效率(> 90%)和2.53 mAh cm - 2的高面积比容量。此外,基于G/LC阳极和LiNi6Mn2Co2O2阴极的全电池具有76.7%的初始库仑效率,以及200次循环后97.52%的高容量保持率,表明该扩展策略在可充电电池中的潜在应用。
期刊介绍:
The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.