Dendrite-Free Non-Newtonian Semisolid Lithium Metal Anode

被引：27

作者：

Zhang, Yunbo ^{[1
,2
]}

Han, Zhiyuan ^{[1
,2
]}

Huang, Zhijia ^{[1
,2
]}

Zhang, Chen ^{[1
,2
]}

Luo, Chong ^{[1
,2
]}

Zhou, Guangmin ^{[1
,2
]}

Lv, Wei ^{[1
,2
]}

Yang, Quan-Hong ^{[3
]}

机构：

[1] Tsinghua Univ, Shenzhen Geim Graphene Ctr, Tsinghua Berkeley Shenzhen Inst, Shenzhen 518055, Peoples R China

[2] Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China

[3] Tianjin Univ, Nanoyang Grp, Sch Chem Engn & Technol, State Key Lab Chem Engn, Tianjin 300072, Peoples R China

来源：

ACS ENERGY LETTERS | 2021年 / 6卷 / 11期

基金：

中国国家自然科学基金;

关键词：

ELECTRODEPOSITION; DEFORMATION; PERFORMANCE; BATTERIES; STRESS; LIQUID; LAYER; SOFT;

D O I：

10.1021/acsenergylett.1c01977

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Dendrite growth hinders the practical uses of the lithium metal anode (LMA) toward a high-energy-density battery. From the mechanics perspective, the lithium growth on a solid substrate yields a large strength, leading to a short circuit and worsened nonuniform lithium deposition. Inspired by quicksand in nature, we designed a non-Newtonian shear-thinning LMA. Such a quicksand-like LMA shows flowability under pressure and removes the solid substrate for dendrite growth, effectively releasing the stress in electrodes, especially at large current density and high deposition capacity. As a result, a good cycling performance is realized in symmetric cells even under a high current density of 20 mA cm(-2) and a high deposition capacity of 8 mAh cm(-2). The assembled Li- LiFePO4 full cells also show a long stable cycling performance under a low N/P ratio. Moreover, the quicksand-like LMA eliminates the inner stress and keeps the integrity during repeated bending, showing potential use in flexible devices.

引用

页码：3761 / 3768

页数：8

共 45 条

[1] A soft, multilayered lithium-electrolyte interface [J].