Oxygen deficient sea urchin-like Cu-WO3 with high capacity and long life for anode of lithium-ion battery
2023; Elsevier BV; Volume: 618; Linguagem: Inglês
10.1016/j.apsusc.2023.156627
ISSN1873-5584
AutoresJing Shi, Xiaodong Tian, Huixiang Wang, Lin Ge, Junfen Li, Baoliang Lv,
Tópico(s)Advanced Battery Materials and Technologies
ResumoCation-doping and oxygen vacancy (Vo) engineering are powerful strategies to address the low conductivity, sluggish ion kinetics and short cycling life facing in metal oxide. Herein, a series of Cu-doped WO3 with Vo was prepared via a facile hydrothermal method. The results show the ratio of Cu/W plays an important role in morphology regulation and the corresponding electrochemical performance. When the molar ratio of Cu/W is 0.3, the sea urchin-like structured WCu0.3 could be achieved. In this architecture, nanowire is propitious to furnish plentiful transmission channels, paving the way to high rate capability. The sea urchin-like structure with large surface area and rich mesoporous can accommodate the strain during repeat lithiation/delithiation processes, giving rise to high capacity and superior cycling durability. Additionally, the Vo induced by Cu-doping is favorable to the enhancement of conductivity. These combined merits endow WCu0.3 with impressive 1st discharge capacity (1585 mAh g−1 at 0.1 A g−1), good rate capability (621.2 mAh g−1 at 0.1 A g−1 and 520.2 mAh g−1 at 0.5 A g−1) and cycle performance (796.3 mAh g−1 over 300 cycles under 0.5 A g−1). Our work provides a simple approach to optimize metal oxide’s lithium storage performance via Vo regulation by cation-doping.
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