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多孔双结构和异质连接Co₃O₄@NiCo₂O₄加速了全固态硫电池的多硫化物转化

Wenhao Tang¹, Shiyan Deng¹, Youlan Zou¹

¹National-Provincial Laboratory of Special Function Thin Film Materials, School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105 Hunan, PR China.

Journal of colloid and interface science

|April 17, 2025

概括

研究人员开发了一种新的Co3O4@NiCo2O4异构连接,以增强全固态硫电池. 这种材料提高了离子导电性和聚硫化物转化,为高能量密度电池铺平了道路.

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:

全固态硫电池 (ASSLSB) 提供了高能量密度的潜力,但面临着挑战.
关键问题包括较差的离子导电性,较低的Li+转移数和低效的聚硫化物 (LiPSs) 转换.

研究的目的:

通过开发一种新的复合材料来解决ASSLSB的局限性.
为了增强离子导电性,Li+转移和LiPSs转换,以提高电池性能.

主要方法:

制备一个多孔的双外Co3O4@NiCo2O4异质连接.
与基于聚乙烯氧化物 (PEO) 的固体聚合物电解质 (SPEs) 的异质连接的复合物.
电化学性质的表征,包括离子导电性和LiPSs转换.

主要成果:

Co3O4@NiCo2O4异质连接会产生叠加的电场,从而改善盐解离和离子导电性.
在60°C达到高离子导电性 (1.04 × 10^-3 S/cm) 和Li+转移数 (0.48) .
在1100小时内表现出稳定的Li//Li细胞性能,在Li//S细胞中具有显著的可逆容量 (100个循环后620.1 mAh/g).

结论:

Co3O4@NiCo2O4异质连接有效地提高了ASSLSB的性能.
该材料促进了快速的LiPS转化,并改善了电化学动力学.
这一进步有助于开发下一代高能量密度电池.

关键词:

所有固态硫电池都是固态硫电池.((3) O ((4) @NiCo ((2) O ((4)) 是一个非常重要的元素.异质连接异质连接异质连接离子导电性离子导电性穿效应穿效应穿效应

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