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
内分泌学
工程类
物理化学
医学
作者
Xiaochen Sun,Xuan Gao,Dianxue Cao,Xin Zhang,Xiaoli Zhai,Qiuxia Zhang,Liuan Li,Nan Gao,Guanjie He,Hongdong Li
标识
DOI:10.1002/smtd.202300746
摘要
Abstract 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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