二锂
阴极
单斜晶系
材料科学
对苯二酚
化学工程
离子
阳极
正交晶系
锂(药物)
电极
分离器(采油)
锂离子电池
电池(电)
无机化学
化学
有机化学
晶体结构
物理化学
脱质子化
医学
功率(物理)
物理
量子力学
工程类
热力学
内分泌学
作者
Yong Lü,Haoqin Han,Zhuo Yang,Youxuan Ni,Zhe Meng,Qiu Zhang,Hao Bin Wu,Weiwei Xie,Zhenhua Yan,Jun Chen
摘要
Abstract Lithiated organic cathode materials show a great promise for practical applications in lithium-ion batteries owing to their Li-reservoir characteristics. However, the reported lithiated organic cathode materials still suffer from strict synthesis conditions and low capacity. Here we report a thermal intermolecular rearrangement method without organic solvents to prepare dilithium hydroquinone (Li2Q), which delivers a high capacity of 323 mAh g−1 with an average discharge voltage of 2.8 V. The reversible conversion between orthorhombic Li2Q and monoclinic benzoquinone during charge/discharge processes is revealed by in situ X-ray diffraction. Theoretical calculations show that the unique Li–O channels in Li2Q is beneficial for Li+ ion diffusion. In situ ultraviolet-visible spectra demonstrate that the dissolution issue of Li2Q electrode during charge/discharge processes can be handled by separator modification, resulting in enhanced cycling stability. This work enlightens the synthesis and battery application of high-capacity lithiated organic cathode materials.
科研通智能强力驱动
Strongly Powered by AbleSci AI