Sun, X; Gao, X; Li, Z; Zhang, X; Zhai, X; Zhang, Q; Li, L; ... Li, H; + view all Sun, X; Gao, X; Li, Z; Zhang, X; Zhai, X; Zhang, Q; Li, L; Gao, N; He, G; Li, H; - view fewer (2023) Nanowires Framework Supported Porous Lotus-Carbon Anode Boosts Lithium-Ion and Sodium-Ion Batteries. Small Methods , Article e2300746. 10.1002/smtd.202300746.

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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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