Zhu Guozhen, Liu Zhaochuan, Yu Linhe, Zhang Yiyao, Yang Zhen, Che Renchao
Institute of Advanced Materials, Jiangxi Normal University, Nanchang, Jiangxi 330022, P. R. China.
Laboratory of Advanced Materials, Fudan University, Shanghai 200438, P. R. China.
Langmuir. 2024 Mar 19;40(11):5731-5737. doi: 10.1021/acs.langmuir.3c03429. Epub 2024 Mar 7.
Carbon layers-coated porous CoO/NiO (denoted as PCNO@C) chains are synthesized by the facile solvothermal method and subsequently annealing treatment under an Ar atmosphere, which are assembled from numerous CoO/NiO nanosheets. Benefiting from the unique porous chain structure, the volume change of the electrode is greatly relieved during the long-term cycling processes, and then an excellent cycling stability is obtained (the reversible specific capacity of the 1000th cycle can reach 637.3 mA h g at 5000 mA g). Besides, a continuous conductive network is constructed by the coated carbon layers and long chains, the movement rate of electrons is effectively accelerated, and the high rate capability is obtained (the high reversible specific capacity of 480.6 mA h g is retained at 10,000 mA g). This work contributes a new idea to construct porous chain structure anode materials.
通过简便的溶剂热法合成碳层包覆的多孔CoO/NiO（记为PCNO@C）链，随后在氩气气氛下进行退火处理，其由大量CoO/NiO纳米片组装而成。得益于独特的多孔链结构，电极在长期循环过程中的体积变化得到极大缓解，进而获得了优异的循环稳定性（第1000次循环的可逆比容量在5000 mA g时可达到637.3 mA h g）。此外，包覆的碳层和长链构建了连续的导电网络，有效加速了电子的移动速率，从而获得了高倍率性能（在10,000 mA g时仍保留480.6 mA h g的高可逆比容量）。这项工作为构建多孔链结构阳极材料提供了新思路。
