聚-1,3-二氧化醇定石墨碳化物以实现高能量密度的固态金属电池
Yu Chen1, Junying Yin2, Sen Jiang3
1School of Materials Science and Hydrogen Energy, Foshan University, Foshan, Guangdong 528000, PR China; Engineering Research Center for Industrial Wastewater Treatment and Reuse of Shandong Province, Binzhou Key Laboratory of Applied Electrochemistry, College of Chemical Engineering and Safety, Binzhou University, Binzhou 256603, PR China.
Journal of colloid and interface science
|August 21, 2023
概括
一个新的"灵活和刚性"策略通过创建复合聚合物电解质来增强固态金属电池 (SSLMB). 这提高了离子导电性,接口稳定性和机械强度,以实现更安全,高性能的能量存储.
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
- 聚合物科学 聚合物科学
背景情况:
- 固态金属电池 (SSLMB) 为下一代储能提供高能量密度和安全优势.
- 对于SSLMBs的关键挑战包括低离子导电性,差的界面兼容性和树形成.
- 先进的固态电解质对于克服这些限制和提高电池性能至关重要.
研究的目的:
- 开发一种新的复合聚合物电解质用于SSLMB,使用"灵活和刚性"的策略.
- 提高基于聚乙烯氧化物 (PEO) 的电解质的电化学和机械性能.
- 为了应对离子导电性,界面稳定性和树生长方面的挑战.
主要方法:
- 采用了"灵活和刚性"的策略,通过合反应协调灵活的聚-1,3-二氧化 (聚-DOL) 与刚性石墨化碳 (g-C3N4).
- 由此产生的g-C3N4-poly-DOL被用作PEO矩阵中的填充物,以创建一个复合聚合物电解质 (g-C3N4-pDOL-PEO).
- 使用Li/g-C3N4-pDOL-PEO/LiFePO4和Li/g-C3N4-pDOL-PEO/Li细胞进行电化学性能评估.
主要成果:
- 复合电解质表现出良好的界面稳定性,高离子导电性和强大的机械强度,这是由于组合的柔性和刚性组件.
- /g-C3N4-pDOL-PEO/LiFePO4电池显示出高循环性,在150个循环后保持89.7%的容量,平均库伦比效率>99.9%.
- 该Li/g-C3N4-pDOL-PEO/Li细胞在0.2 mAh cm-2的低极化 (13 mV) 时300多小时表现出稳定的循环.
结论:
- 这种"灵活而刚性"的策略有效地增强了基于PEO的电解质的电化学和机械性能.
- 这种方法为开发高性能和安全的SSLMB提供了有效的电解质设计.
- 协调的聚合物填充系统为先进的固态电池技术提供了一个有前途的途径.
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