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Facile construction of hollow carbon nanosphere-interconnected network for advanced sodium-ion battery anode

Zhang, Weicai, Lan, Chaowen, Xie, Xiuhong, Cao, Qiaoying, Zheng, Mingtao, Dong, Hanwu, Hu, Hang, Xiao, Yong, Liu, Yingliang, Liang, Yeru
Journal of colloid and interface science 2019 v.546 pp. 53-59
anodes, batteries, carbon, energy, nanospheres, sodium, surface area
Sodium-ion batteries are promising next-generation electrical-energy-storage devices due to the relative low cost, and the natural abundance of sodium resources. Yet developmental anodes in sodium-ion batteries such as carbonaceous materials have adagio sodium ion diffusion kinetics, huge volume expansion, poor rate performance and cycle stability. Herein, we report a high-performance sodium ion storage anode material, i.e., a unique nanonetwork-structured carbon (NNSC) with a valuable hollow nanosphere as network unit by developing a facile, efficient and post-treatment-free strategy. The as-constructed NNSC exhibits a three-dimensional interconnected hierarchical porous network and a luxuriant accessible surface area, which greatly enhance sodium ion transport and storage. Thus, the obtained NNSC demonstrates excellent sodium ion storage performance, including a high capacity of 250 mA h g−1, good rate capability, and ultra-long-term cycle life up to 9000 cycles. Such attractive capabilities could accelerate the application of sodium-ion batteries in large-scale energy storage.