阴极
材料科学
水溶液
锰
化学工程
离子
功率密度
电池(电)
锂(药物)
纳米棒
能量密度
纳米技术
冶金
工程物理
功率(物理)
化学
电气工程
工程类
医学
物理
有机化学
物理化学
量子力学
内分泌学
作者
Jiwei Xie,Guijing Liu,Kaikai Wang,Xueming Li,Yusen Bai,Shanmin Gao,Leqing Fan,Rundou Zheng
标识
DOI:10.1007/s11705-022-2214-7
摘要
Aqueous zinc-ion batteries are attracting considerable attention because of their high safety compared with conventional lithium-ion batteries. Manganese-based materials have been widely developed for zinc-ion batteries cathode owning to their low cost, high security and simple preparation. However, the severe volume expansion and poor stability during charging and discharging limit the further development of manganese-based cathodes. Herein, superior α-MnO2@g-C3N4 was successfully prepared for stable zinc-ion batteries (ZIBs) cathode by introducing g-C3N4 nanosheets. Compared with pure α-MnO2, α-MnO2@g-C3N4 has a specific capacity of 298 mAh·g−1 at 0.1 A·g−1. Even at 1 A·g−1, the α-MnO2@g-C3N4 still retains 100 mAh·g−1 (83.4% retention after 5000 cycles), implying its excellent cycling stability. The α-MnO2@g-C3N4-based cathode has the highest energy density (563 Wh·kg−1) and power energy density (2170 W·kg−1). This work provides new avenues for the development of a wider range of cathode materials for ZIBs.
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