用表面活性剂协助对基于甲的硬碳微球进行分子级调整,用于高性能离子电池
Yuting Liu1, Di Liu1, Peng Liu1
1State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
Journal of colloid and interface science
|April 8, 2024
概括
研究人员开发了一种使用烯酸的新方法,用于为离子电池设计基于甲的硬碳微球. 这一战略提高了离子传输和电池性能,为先进的储能解决方案提供了一个有前途的途径.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 甲 (PF) 树脂是离子电池 (SIB) 中硬碳 (HC) 阳极的经济有效前体.
- 精确的分子水平控制基于PF的HC微球,以优化离子传输仍然是一个重大挑战.
- 开发先进的阳极材料对于提高SIB性能至关重要.
研究的目的:
- 开发基于PF的HC微球的分子级工程策略,使用烯酸 (SL).
- 优化HC微球内的离子运输微结构,以提高SIB性能.
- 研究SL对基于PF的HC微球的合成和电化学性能的影响.
主要方法:
- 通过聚合3 - 氨基和甲合成PF微球.
- 使用烯酸作为表面活性剂和催化剂来控制微球大小并增强聚合.
- 分析了结构修改 (直径,层间间距,石墨化) 和电化学性能 (容量,速率能力,循环稳定性).
主要成果:
- SL辅助的策略导致了微球直径的减少,层间间距的增加,以及增强的石墨化.
- 观察到电子和离子转移的显著改善.
- 实现了337 mAh/g的可逆容量,在5.0 A/g时保持96.9 mAh/g.
- 全电池表现出高容量 (150 mAh/g),能量密度 (125.3 Wh kg-1),以及出色的长期稳定性 (>3000 个周期).
结论:
- 表面活性剂辅助的分子级工程对于定制HC微球是有效的.
- 基于SL修改的PF的HC微球显示出作为高性能SIB的阳极的巨大潜力.
- 这种方法为开发下一代储能设备的先进阳极材料提供了一条途径.
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