微尺寸 MoS6@15%Li7P3S11 复合材料实现了稳定的全固态高容量电池

IF 4.6 4区 化学 Q2 ELECTROCHEMISTRY
Batteries Pub Date : 2023-11-17 DOI:10.3390/batteries9110560
Ming-Hsin Chang, Mengli Yang, Wenrui Xie, Fuli Tian, Gaozhan Liu, Ping Cui, Tao Wu, X. Yao
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引用次数: 0

摘要

不含任何液态有机电解质的全固态锂电池可实现高能量密度,同时消除易燃性问题。阴极层中具有高比容量和良好界面接触的活性材料是实现良好电化学性能的关键。在此,我们报告了一种粒径为 1-4 μm 的高容量多硫化物阴极材料 MoS6@15%Li7P3S11。在 0.1 A g-1 的条件下,MoS6 的初始比容量达到了惊人的 913.9 mAh g-1。与 Li7P3S11 电解质涂层结合后,MoS6@15%Li7P3S11 复合材料的界面接触得到改善,离子扩散率范围从 10-12-10-11 cm2 s-1 到 10-11-10-10 cm2 s-1。锂/锂6PS5Cl/MoS6@15%Li7P3S11全固态锂电池在 1.0-3.0 V 电流密度为 0.1 A g-1 时,可提供超高的初始容量和可逆比容量,分别为 1083.8 mAh g-1 和 851.5 mAh g-1。即使在 1 A g-1 的条件下,电池在循环 1000 次后仍能保持 400 mAh g-1 的可逆比容量。这项研究勾勒出了一种前景广阔的阴极材料,它具有亲密的界面接触、阴极层内卓越的离子传输动力学以及高比容量,可用于全固态锂电池。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Micro-Sized MoS6@15%Li7P3S11 Composite Enables Stable All-Solid-State Battery with High Capacity
All-solid-state lithium batteries without any liquid organic electrolytes can realize high energy density while eliminating flammability issues. Active materials with high specific capacity and favorable interfacial contact within the cathode layer are crucial to the realization of good electrochemical performance. Herein, we report a high-capacity polysulfide cathode material, MoS6@15%Li7P3S11, with a particle size of 1–4 μm. The MoS6 exhibited an impressive initial specific capacity of 913.9 mAh g−1 at 0.1 A g−1. When coupled with the Li7P3S11 electrolyte coating layer, the resultant MoS6@15%Li7P3S11 composite showed improved interfacial contact and an optimized ionic diffusivity range from 10−12–10−11 cm2 s−1 to 10−11–10−10 cm2 s−1. The Li/Li6PS5Cl/MoS6@15%Li7P3S11 all-solid-state lithium battery delivered ultra-high initial and reversible specific capacities of 1083.8 mAh g−1 and 851.5 mAh g−1, respectively, at a current density of 0.1 A g−1 within 1.0–3.0 V. Even under 1 A g−1, the battery maintained a reversible specific capacity of 400 mAh g−1 after 1000 cycles. This work outlines a promising cathode material with intimate interfacial contact and superior ionic transport kinetics within the cathode layer as well as high specific capacity for use in all-solid-state lithium batteries.
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来源期刊
Batteries
Batteries Energy-Energy Engineering and Power Technology
CiteScore
4.00
自引率
15.00%
发文量
217
审稿时长
7 weeks
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