One‐pot solution combustion synthesis of crystalline and amorphous molybdenum trioxide as anode for lithium‐ion battery
Haoyang Wu, Shiqi Zhou, Chao‐Heng Tseng, Mingli Qin, Angus Shiue, Aimin Chu, Zhiqin Cao, Baorui Jia, Xuanhui Qu
Abstract
Abstract In this study, crystalline MoO 3 rods and amorphous MoO 3 microsheets were synthesized using a one‐step, large‐scale, and time‐ and energy‐efficient solution combustion synthesis method. When urea was used as a fuel, ultralong rod‐like crystalline MoO 3 with a length over 50 μm was synthesized. In the case of citric acid, an amorphous MoO 3 product with a porous microsheet structure was obtained. As anode materials for lithium‐ion batteries, the unique structure of amorphous MoO 3 sample has significant advantages including fast diffusion of lithium ion, providing a lot of active sites for lithium ion storage and stable structure. Thus, the amorphous MoO 3 sample exhibits greater electrochemical performance, a high capacity of 818 mAh g −1 at 0.1 A g −1 in the 100th cycle and 510 mAh g −1 at 1 A g −1 in the 300th cycle, than that of crystalline MoO 3 product. Moreover, this study provides guide for preparing other amorphous and crystalline transition‐metal oxides with a pure phase.