Wang Lei, Dong Yifan, Zhao Kangning, Luo Wen, Li Shuo, Zhou Liang, Mai Liqiang
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, Hubei, China.
Phys Chem Chem Phys. 2017 May 24;19(20):13341-13347. doi: 10.1039/c7cp00049a.
Interconnected LiCuVO networks were synthesized through a facile surfactant-assisted approach. Detailed investigations on the lithium storage mechanism manifest that metallic Cu nanoparticles are generated in situ during the first discharge process and remain mostly intact in the following cycles, thereby enhancing conductivity of the electrode. The interconnected networks with submicron sized primary particles endow the LiCuVO with a large amount of active sites and thus high capacitive charge storage. Benefiting from a peculiar structure, the resultant interconnected LiCuVO networks deliver extraordinary rate performance (216 mA h g up to 10 A g) and ultralong cycling stability (∼85% capacity retention after 5000 cycles at 5 A g). The exceptional rate performance and cycling stability show that the interconnected LiCuVO networks possess great potential for lithium-ion batteries.
通过一种简便的表面活性剂辅助方法合成了相互连接的LiCuVO网络。对锂存储机制的详细研究表明，在首次放电过程中原位生成了金属铜纳米颗粒，并且在随后的循环中大部分保持完整，从而提高了电极的导电性。具有亚微米级初级颗粒的相互连接网络赋予LiCuVO大量的活性位点，因此具有高电容电荷存储能力。得益于独特的结构，所得的相互连接的LiCuVO网络具有出色的倍率性能（在10 A g下可达216 mA h g）和超长的循环稳定性（在5 A g下5000次循环后容量保持率约为85%）。优异的倍率性能和循环稳定性表明，相互连接的LiCuVO网络在锂离子电池方面具有巨大的潜力。
