Tran Quang Nhat, Kim Il Tae, Park Sangkwon, Choi Hyung Wook, Park Sang Joon
Department of Chemical and Biological Engineering, Gachon University, Seongnam 13120, Korea.
Department of Chemical and Biochemical Engineering, Dongguk University, Jung-gu, Seoul 04620, Korea.
Materials (Basel). 2020 Jul 15;13(14):3165. doi: 10.3390/ma13143165.
One of the biggest challenges in the commercialization of tin dioxide (SnO-based lithium-ion battery (LIB) electrodes is the volume expansion of SnO during the charge-discharge process. Additionally, the aggregation of SnO also deteriorates the performance of anode materials. In this study, we prepared SnO nanoflowers (NFs) using nanocrystalline cellulose (CNC) to improve the surface area, prevent the particle aggregation, and alleviate the change in volume of LIB anodes. Moreover, CNC served not only as the template for the synthesis of the SnO NFs but also as a conductive material, after annealing the SnO NFs at 800 °C to improve their electrochemical performance. The obtained CNC-SnONF composite was used as an active LIB electrode material and exhibited good cycling performance and a high initial reversible capacity of 891 mA h g, at a current density of 100 mA g. The composite anode could retain 30% of its initial capacity after 500 charge-discharge cycles.
二氧化锡（SnO）基锂离子电池（LIB）电极商业化过程中最大的挑战之一是SnO在充放电过程中的体积膨胀。此外，SnO的聚集也会降低负极材料的性能。在本研究中，我们使用纳米晶纤维素（CNC）制备了SnO纳米花（NFs），以增加表面积、防止颗粒聚集，并减轻LIB负极的体积变化。此外，CNC不仅作为合成SnO NFs的模板，还作为导电材料，在800℃对SnO NFs进行退火处理以改善其电化学性能。所制备的CNC-SnONF复合材料用作活性LIB电极材料，在100 mA g的电流密度下表现出良好的循环性能和891 mA h g的高初始可逆容量。经过500次充放电循环后，复合负极仍能保持其初始容量的30%。
