Li Yan, Zhang Ye
School of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, China.
School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China.
Nanomaterials (Basel). 2021 Oct 29;11(11):2903. doi: 10.3390/nano11112903.
Low-dimensional nanomaterials have attracted considerable attention for next-generation flexible energy devices owing to their excellent electrochemical properties and superior flexibility. Herein, uniform Tellurium nanotubes (Te NTs) were prepared through a facile hydrothermal method, and then a flexible and freestanding electrode was fabricated with Te NTs as active materials and a small amount of nanofibrillated celluloses (NFCs) as a flexible matrix through a vacuum filtration method without adding extra conductive carbon or a binder. The resulting Te-based electrode exhibits a high volumetric capacity of 1512 mAh cm at 200 mA g, and delivers admirable cyclic stability (capacity retention of 104% over 300 cycles) and excellent rate performance (833 mAh cm at 1000 mA g), which benefits from the unique structure and intrinsically superior conductivity of Te NTs. After bending 50 times, the Te-based electrode delivers a desirable volumetric capacity of 1117 mAh cm, and remains 93% of initial capacity after 100 cycles. The results imply that the Te-based electrode exhibits excellent electrochemical properties and superior flexibility simultaneously, which can serve as a potential candidate for the flexible lithium batteries.
由于其优异的电化学性能和卓越的柔韧性，低维纳米材料在下一代柔性能源器件方面引起了广泛关注。在此，通过简便的水热法制备了均匀的碲纳米管（Te NTs），然后以Te NTs作为活性材料，以少量纳米原纤化纤维素（NFCs）作为柔性基质，通过真空过滤法制备了一种柔性独立电极，无需添加额外的导电碳或粘结剂。所得的碲基电极在200 mA g下表现出1512 mAh cm的高体积容量，并具有令人满意的循环稳定性（300次循环后容量保持率为104%）和优异的倍率性能（在1000 mA g下为833 mAh cm），这得益于Te NTs独特的结构和固有的优异导电性。弯曲50次后，碲基电极的体积容量为1117 mAh cm，100次循环后仍保持初始容量的93%。结果表明，碲基电极同时表现出优异的电化学性能和卓越的柔韧性，可作为柔性锂电池的潜在候选材料。
