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首页> 外文期刊>RSC Advances >Porous N-doped carbon material derived from prolific chitosan biomass as a high-performance electrode for energy storage
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Porous N-doped carbon material derived from prolific chitosan biomass as a high-performance electrode for energy storage

机译：富含壳聚糖生物质的多孔氮掺杂碳材料，作为高性能的储能电极

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摘要

Although a wide variety of biomass, such as human hair, chicken eggshells and ox horns, have been used to prepare carbon electrode materials for energy storage, most of them have very limited production, which restricts their large-scale application. Herein, the very prolific biomass of chitosan is employed as an abundant raw material to successfully prepare one porous N-doped carbon material (PNCM). Structural characterizations demonstrate that this PNCM is hierarchically porous with abundant macro/micropores and 4.19% N-doping. The electrochemical properties of the PNCM as electrode materials for both supercapacitors and lithium ion batteries are also studied. When used in a supercapacitor, the optimized PNCM synthesized at 700 degrees C can store electrical energy with a specific capacitance of up to 220 F g(-1) in 1 mol L-1 H2SO4 electrolyte, exhibit excellent cycle stability with only 1.3% capacitance decay over 11 000 cycles, and deliver high power and energy densities in both aqueous and organic electrolytes. In addition to supercapacitors, the PNCM also exhibits excellent Li-storage properties in terms of high specific capacity (above 460 mA h g(-1) at 50 mA g(-1)) and superior cycle stability (without any capacity decay even after 1100 cycles) when used as an anode material for lithium ion batteries.
机译：尽管已经使用各种各样的生物质，例如人的头发，鸡的蛋壳和牛角来制备用于储能的碳电极材料，但是其中大多数生产非常有限，这限制了它们的大规模应用。在此，壳聚糖的非常丰富的生物质被用作丰富的原料，以成功地制备一种多孔的氮掺杂碳材料（PNCM）。结构表征表明，该PNCM具有大量的大孔/微孔和4.19％的N掺杂，具有层次结构的多孔性。还研究了作为超级电容器和锂离子电池电极材料的PNCM的电化学性能。当用于超级电容器时，在700摄氏度下合成的优化PNCM可以在1 mol L-1 H2SO4电解质中存储具有高达220 F g（-1）的比电容的电能，具有出色的循环稳定性，而电容仅为1.3％在11000个循环中衰减，并在水性和有机电解质中提供高功率和能量密度。除超级电容器外，PNCM还具有出色的锂存储特性，具有高比容量（在50 mA g（-1）时为460 mA hg（-1）以上）和出色的循环稳定性（即使在1100之后也没有任何容量衰减）循环）用作锂离子电池的负极材料。

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