材料科学
阳极
锂(药物)
碳纤维
石墨烯
化学工程
多孔性
纳米技术
离子
钠
插层(化学)
无机化学
复合材料
电极
化学
复合数
有机化学
冶金
医学
物理化学
工程类
内分泌学
作者
Xiaochen Sun,Xuan Gao,Zhuo Li,Xin Zhang,Xiaoli Zhai,Qiuxia Zhang,Liuan Li,Nan Gao,Guanjie He,Hongdong Li
标识
DOI:10.1002/smtd.202300746
摘要
The novel design of carbon materials with stable nanoarchitecture and optimized electrical properties featuring simultaneous intercalation of lithium ions (Li+ ) and sodium ions (Na+ ) is of great significance for the superb lithium- sodium storage capacities. Biomass-derived carbon materials with affluent porosity have been widely studied as anodes for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). However, it remains unexplored to further enhance the stability and utilization of the porous carbon skeleton during cycles. Here, a lotus stems derived porous carbon (LPC) with graphene quantum dots (GQDs) and intrinsic carbon nanowires framework (CNF) is successfully fabricated by a self-template method. The LPC anodes show remarkable Li+ and Na+ storage performance with ultrahigh capacity (738 mA h g-1 for LIBs and 460 mA h g-1 for SIBs at 0.2 C after 300 cycles, 1C≈372 mA h g-1 ) and excellent long-term stability. Structural analysis indicates that the CNFs-supported porous structure and internal GQDs with excellent electrical conductivity contribute significantly to the dominant capacitive storage mechanism in LPC. This work provides new perspectives for developing advanced carbon-based materials for multifunctional batteries with improved stability and utilization of porous carbon frameworks during cycles.
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