AI Article Synopsis
- Red phosphorus (RP) shows potential as an anode material for sodium-ion batteries (SIBs) due to its high energy density, but its poor conductivity and significant volume changes during sodium ion movement limit its effectiveness.
- A novel composite, PC@RP, is created by combining RP with porous carbon derived from edible fungus, improving electron and sodium ion transfer while mitigating volume expansion through a sturdy carbon framework.
- The PC@RP composite delivers a notable specific capacity of 655.1 mA h g with 87% retention after 100 cycles, and when used in a full SIB with a P2-NaNiMnTiO cathode, it achieves a capacity of 77.3 mA h g while maintaining
Article Abstract
Red phosphorus (RP) as the anode material for the sodium-ion battery (SIB) possesses a high energy density, but the poor electronic conductivity and huge volume change during Na insertion/extraction restrict its application. In this work, the edible fungus slag-derived porous carbon (PC) is adopted as a carbon matrix to combine with RP to form PC@RP composites through a facile vaporization-condensation approach. The conductive porous carbon architecture improves the transfer of electron and Na in the composite. The robust carbon framework together with the chemical bonding between PC and RP effectively buffer the huge volumetric change of RP. As a result, the PC@RP composite material delivers a specific capacity of 655.1 mA h g at 0.1 A g with a capacity retention of 87% after 100 charging/discharging cycles. In particular, the full SIB assembled with P2-NaNiMnTiO as the cathode material and PC@RP as the anode material exhibits a specific capacity of 77.3 mA h g (based on the mass of cathode material) at 0.5 C, and 85% capacity is retained after 100 charging/discharging cycles.
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| http://dx.doi.org/10.1021/acsami.9b17123 | DOI Listing |
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