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Title: Compact 3D Copper with Uniform Porous Structure Derived by Electrochemical Dealloying as Dendrite-Free Lithium Metal Anode Current Collector

Abstract

Here, the development of lithium (Li) metal anodes Li metal batteries faces huge challenges such as uncontrolled Li dendrite growth and large volume change during Li plating/stripping, resulting in severe capacity decay and high safety hazards. A 3D porous copper (Cu) current collector as a host for Li deposition can effectively settle these problems. However, constructing a uniform and compact 3D porous Cu structure is still an enormous challenge. Herein, an electrochemical etching method for Cu–Zinc (Zn) alloy is reported to precisely engrave a 3D Cu structure with uniform, smooth, and compact porous network. Such a continuous structure endows 3D Cu excellent mechanical properties and high electrical conductivity. The uniform and smooth pores with a large internal surface area ensures well dispersed current density for homogeneous Li metal deposition and accommodation. A smooth and stable solid electrolyte interphase is formed and meanwhile Li dendrites and dead Li are effectively suppressed. The Li metal anode conceived 3D Cu current collector can stably cycle for 400 h under an Li plating/stripping capacity of 1 mA h cm–2 and a current density of 1 mA cm–2. The Li@3D Cu||LiFePO4 full cells present excellent cycling and rate performances. The electrochemical dealloying is a robustmore » method to construct 3D Cu current collectors for dendrite–free Li metal anodes.« less

Authors:
 [1];  [1];  [2];  [3];  [4];  [1];  [2];  [2];  [5];  [1]; ORCiD logo [3]
  1. Tsinghua Univ., Shenzhen (People's Republic of China); Tsinghua Univ., Beijing (People's Republic of China)
  2. Tsinghua Univ., Shenzhen (People's Republic of China)
  3. Argonne National Lab. (ANL), Lemont, IL (United States)
  4. Nanyang Technological Univ. (Singapore)
  5. Tianjin Univ., Tianjin (People's Republic of China)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Key Basic Research Program of China; National Natural Science Foundation of China (NSFC); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1466310
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Advanced Energy Materials
Additional Journal Information:
Journal Volume: 8; Journal Issue: 19; Journal ID: ISSN 1614-6832
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 3D porous copper; Cu–Zn alloys; Li metal batteries; compact structures; electrochemical etching

Citation Formats

Zhao, Heng, Lei, Danni, He, Yan -Bing, Yuan, Yifei, Yun, Qinbai, Ni, Bin, Lv, Wei, Li, Baohua, Yang, Quan -Hong, Kang, Feiyu, and Lu, Jun. Compact 3D Copper with Uniform Porous Structure Derived by Electrochemical Dealloying as Dendrite-Free Lithium Metal Anode Current Collector. United States: N. p., 2018. Web. https://doi.org/10.1002/aenm.201800266.
Zhao, Heng, Lei, Danni, He, Yan -Bing, Yuan, Yifei, Yun, Qinbai, Ni, Bin, Lv, Wei, Li, Baohua, Yang, Quan -Hong, Kang, Feiyu, & Lu, Jun. Compact 3D Copper with Uniform Porous Structure Derived by Electrochemical Dealloying as Dendrite-Free Lithium Metal Anode Current Collector. United States. https://doi.org/10.1002/aenm.201800266
Zhao, Heng, Lei, Danni, He, Yan -Bing, Yuan, Yifei, Yun, Qinbai, Ni, Bin, Lv, Wei, Li, Baohua, Yang, Quan -Hong, Kang, Feiyu, and Lu, Jun. Fri . "Compact 3D Copper with Uniform Porous Structure Derived by Electrochemical Dealloying as Dendrite-Free Lithium Metal Anode Current Collector". United States. https://doi.org/10.1002/aenm.201800266. https://www.osti.gov/servlets/purl/1466310.
@article{osti_1466310,
title = {Compact 3D Copper with Uniform Porous Structure Derived by Electrochemical Dealloying as Dendrite-Free Lithium Metal Anode Current Collector},
author = {Zhao, Heng and Lei, Danni and He, Yan -Bing and Yuan, Yifei and Yun, Qinbai and Ni, Bin and Lv, Wei and Li, Baohua and Yang, Quan -Hong and Kang, Feiyu and Lu, Jun},
abstractNote = {Here, the development of lithium (Li) metal anodes Li metal batteries faces huge challenges such as uncontrolled Li dendrite growth and large volume change during Li plating/stripping, resulting in severe capacity decay and high safety hazards. A 3D porous copper (Cu) current collector as a host for Li deposition can effectively settle these problems. However, constructing a uniform and compact 3D porous Cu structure is still an enormous challenge. Herein, an electrochemical etching method for Cu–Zinc (Zn) alloy is reported to precisely engrave a 3D Cu structure with uniform, smooth, and compact porous network. Such a continuous structure endows 3D Cu excellent mechanical properties and high electrical conductivity. The uniform and smooth pores with a large internal surface area ensures well dispersed current density for homogeneous Li metal deposition and accommodation. A smooth and stable solid electrolyte interphase is formed and meanwhile Li dendrites and dead Li are effectively suppressed. The Li metal anode conceived 3D Cu current collector can stably cycle for 400 h under an Li plating/stripping capacity of 1 mA h cm–2 and a current density of 1 mA cm–2. The Li@3D Cu||LiFePO4 full cells present excellent cycling and rate performances. The electrochemical dealloying is a robust method to construct 3D Cu current collectors for dendrite–free Li metal anodes.},
doi = {10.1002/aenm.201800266},
journal = {Advanced Energy Materials},
number = 19,
volume = 8,
place = {United States},
year = {2018},
month = {3}
}

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