期刊
CHEMICAL ENGINEERING JOURNAL
卷 415, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.128942
关键词
SbPO4; Polyimide; Hard carbon; Sodium ion batteries
资金
- Guangdong Basic and Applied Basic Research Foundation [2019A1515011615]
- Project of the Department of Education of Guangdong Province [2018KTSCX047]
- Science and Technology Program of Guangzhou [2019050001]
- Challenge Cup Gold Seed Cultivation Project of South China Normal University [20WDKC01]
- Graduate Student Innovation Program of South China Normal University [2019LKXM039]
- Scientific and Technological Plan of Guangdong Province, China [2019B090905005]
The SbPO4/NTC composite, utilized as an anode material for sodium ion batteries, exhibits remarkable electrochemical performance with high discharge capacity and notable rate capability. Furthermore, it shows favorable capacity in a wide operating temperature range, indicating great potential for efficient sodium ion storage.
The mesh-like hard carbon loaded SbPO4 (SbPO4/NTC) was harvested and employed as anode material for sodium ion batteries. Profiting from prominent capacitance, porous structure, and sufficient buffering space, the composite realizes high electrochemical kinetics for sodium ion storage. The SbPO4/NTC composite gains impressive battery properties, such as high discharge capacity of 413.7 mAh g(-1) under 0.5 A g(-1) after 200 cycles and conspicuous rate performance of 365.7 mAh g(-1) even at 6 A g(-1). In addition, the composite demonstrates a wide operation-temperature window with favorable capacities of 194.3-397.6 mAh g(-1) from -10 degrees C to 60 degrees C at 0.1 A g(-1). The phase transition and sodium storage mechanism are elucidated by density functional theory (DFT) calculation. Therefore, the SbPO4/NTC composite has a great potential for high-efficient sodium ion storage.
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