碳化
阳极
材料科学
多孔性
碳纤维
化学工程
石墨烯
介孔材料
纤维素
纳米技术
细菌纤维素
电导率
金属有机骨架
电极
扫描电子显微镜
化学
复合数
复合材料
吸附
有机化学
催化作用
物理化学
工程类
作者
Chaoqun Zhang,Qi He,Wenbin Luo,Jian Du,Yehan Tao,Jie Lü,Yi Cheng,Haisong Wang
标识
DOI:10.1016/j.ijbiomac.2023.128745
摘要
The commercial graphene for Li ion batteries (LIBs) has high cost and low capacity. Therefore, it is necessary to develop a novel carbon anode. The cellulose nanowires (CNWs), which has advantages of low cost, high carbon content, is thought as a good carbon precursor. However, direct carbonization of CNWs leads to low surface area and less mesopores due to its easy aggregation. Herein, the metal-organic frameworks (MOFs) have been explored as templates to prepare porous carbon due to their 3D open pore structures. The porous carbon was developed with the coordination effect of CNWs and MOFs. The precursor of MOFs coordinates with the -OH and - COOH groups in the CNWs to provide stable structure. And the MOFs was grown in situ on CNWs to reduce aggregation and provide higher porosity. The results show that the porous carbon has high specific capacity and fast Li+/electronic conductivity. As anode for LIBs, it displays 698 mAh g-1 and the capacity retention is 85 % after 200 cycles. When using in the full-battery system, it exhibits energy density of 480 Wh kg-1, suggesting good application value. This work provides a low-cost method to synthesize porous carbon with fast Li+/electronic conductivity for high-performance LIBs.
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