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使用ZIF-90@PP复合材料分离器长期稳定循环使用无树的金属电池

Shuilan Lyu¹, Xin Zhang², Sheng Huang¹

¹The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China.

Nanomaterials (Basel, Switzerland)

|June 13, 2024

概括

这项研究开发了一种复合材料分离器 (ZIF-90@PP),以防止金属电池 (LMB) 中的树生长. 新型分离器增强了离子转移和稳定性,使电池寿命更长,效率更高.

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:

金属电池 (LMB) 具有高能量密度,但受到树增长的影响,阻碍了实际应用.
统一的沉积和高效的离子运输对于LMB的安全性和性能至关重要.

研究的目的:

开发一种复合材料分离器 (ZIF-90@PP),可促进均的Li+沉积,并抑制树状石的形成.
提高LMBs的电化学性能和循环稳定性.

主要方法:

复合材料分离器的制造方法是通过将酸伊米达框架-90 (ZIF-90) 与聚烯 (PP) 结合起来.
分离器的特性,包括电解质可湿性和离子导电性的描述.
评价分离器在涂/剥离试验和LFP全电池中的性能.

主要成果:

采用ZIF-90@PP分离器,在2 mA cm-2.2下,在780多个小时内表现出稳定的涂/剥离.
使用ZIF-90@PP分离器的LFP全电池在300个循环后实现了98.67%的平均库伦比效率.
复合材料分离器表现出增强的电解质保留和均的Li+分布.

结论:

复合分离器ZIF-90@PP有效地抑制了树的生长,并改善了LMBs的循环稳定性.
ZIF-90的独特特性,如与离子相互作用和+的吸引力,有助于提高电池性能.
这种功能分离器显示出在推进高能量密度金属电池技术方面具有重大潜力.

关键词:

的 ZIF-90-90 的情况.存款方式存款方式二二二二二二二二金属电池是金属电池的一种.分离器分离器分离器分离器分离器分离器

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