Robustness-Heterogeneity-Induced Ultrathin 2D Structure in Li Plating for Highly Reversible Li-Metal Batteries

doi:10.1021/acsami.0c13283

SIC OpenIR

	Robustness-Heterogeneity-Induced Ultrathin 2D Structure in Li Plating for Highly Reversible Li-Metal Batteries
	Huang, MS; Yao, ZG; Wu, QP; Zheng, YJ; Liu, JJ; Li, CL
	2020-10-14
Source Publication	ACS APPLIED MATERIALS & INTERFACES
ISSN	1944-8244
Issue	41 Pages:46132
Subtype	Article
Abstract	Anode interface modification is crucial for the stabilization of Li-metal batteries (LMBs), which have been considered as the most promising system for the electric vehicle market owing to their high energy density (500 W h kg(-1)). However, the biggest challenge for LMBs lies in the preservation of anode reversibility, including plated Li morphology control and dendritic Li inhibition during cycling. Here, we propose a nanostructure modulation strategy of Li grains and plating to activate the anode kinetics of LMBs without the compromise of anode stability. This modulation is triggered by the rapid deposition of ultrathin polydopamine coating on the Cu foil (PDA@Cu), which results in an unusual interlaced growth of vertical or lie-down two-dimensional Li nanoflakes on PDA. The high binding energy (>3 eV) between Li atoms and rich imino/carbonyl groups enables a superior lithiophilicity of PDA to homogenize the Li-ion flowing and Li-mass electroplating with negligible nucleation overpotential. The high Coulombic efficiency (98%) and low voltage hysteresis (similar to 20 mV) are stabilized for at least 300 cycles in the Li-PDA@Cu cell architecture. This PDA@Cu electrode can even tolerate much higher current densities of 5 and 10 mA cm(-2) for 170 and 100 cycles, respectively. The interlaced network of Li nanosheets reinforces the electric contact and therefore charge transfer at the anode-electrolyte interface characterized by small interfacial resistance (<3 Omega cm(2)) and activation energy (0.28 eV). A viewpoint of robustness loss or mechanical heterogeneity in Li plating is discussed to disclose the evolution from column-like Li grains to porous Li sponges and then to compactly stacked Li nanoflakes with porosity shrinkage.
DOI	10.1021/acsami.0c13283
WOS Keyword	FREE LITHIUM DEPOSITION ; INSPIRED POLYDOPAMINE ; RECHARGEABLE LITHIUM ; PROTECTIVE LAYER ; THIN-FILMS ; NUCLEATION ; ANODE
Language	英语
WOS Research Area	Science & Technology - Other Topics ; Materials Science
Publisher	AMER CHEMICAL SOC
Citation statistics
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/27689
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Huang, MS,Yao, ZG,Wu, QP,et al. Robustness-Heterogeneity-Induced Ultrathin 2D Structure in Li Plating for Highly Reversible Li-Metal Batteries[J]. ACS APPLIED MATERIALS & INTERFACES,2020(41):46132.
APA	Huang, MS,Yao, ZG,Wu, QP,Zheng, YJ,Liu, JJ,&Li, CL.(2020).Robustness-Heterogeneity-Induced Ultrathin 2D Structure in Li Plating for Highly Reversible Li-Metal Batteries.ACS APPLIED MATERIALS & INTERFACES(41),46132.
MLA	Huang, MS,et al."Robustness-Heterogeneity-Induced Ultrathin 2D Structure in Li Plating for Highly Reversible Li-Metal Batteries".ACS APPLIED MATERIALS & INTERFACES .41(2020):46132.

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