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来自生物质的多层石墨烯纳米用于快充,长周期和低温度的离子阳极

Kevin R McKenzie¹, Nathan A Banek¹, Michael J Wagner¹

¹Department of Chemistry, The George Washington University, Washington, DC 20052, USA.

Materials (Basel, Switzerland)

|August 28, 2025

概括

可持续的纤维素衍生的石墨烯纳米 (MGNS) 能够快速充电和稳定的离子电池循环. 这些材料即使在低温下也能保持高容量, 为石墨提供了有希望的替代品.

科学领域:

材料科学
电化学
可持续能源

背景情况:

纤维素是一种可持续的生物聚合物,
石墨烯纳米 (MGNS) 为高性能储能应用提供了潜力.
为离子电池开发高效稳定的电极材料至关重要.

研究的目的:

使用不同的金属催化剂从纤维素合成石墨烯纳米 (MGNS).
研究MGNS的离子介质机制和电化学性能.
评估MGNS在碳酸电解质中的循环稳定性和低温性能.

主要方法:

使用不同的金属催化剂盐从纤维素合成MGNS.
用于离子循环的MGNS的电化学特征.
在各种温度下进行性能评估,包括零度以下的条件.

主要成果:

从纤维素合成的MGNS通过介质证明了可逆的离子循环.
可逆容量与3D图形秩序的程度相关.
实现了快速充电 (36秒内20%) 和稳定循环 (在900个循环中损失了3.8%的容量).
在碳酸电解质中观察到稳定的性能,即使在-35°C,保持 95% 的室温容量.

结论:

纤维素制成的MGNS是离子电池的有效阳极材料.
MGNS的独特结构使其能够快速充电并保持卓越的循环稳定性.
MGNS具有具有前途的低温性能和与环保电解质的兼容性.

关键词:

生物炭碳洋激光热解价值化

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