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Title: High-Rate and Large-Capacity Lithium Metal Anode Enabled by Volume Conformal and Self-Healable Composite Polymer Electrolyte

Journal Article · · Advanced Science
 [1];  [2];  [1];  [1];  [2];  [3]; ORCiD logo [1]
  1. ShanghaiTech Univ., Shanghai (China)
  2. Stanford Univ., Stanford, CA (United States)
  3. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)

The widespread implementation of lithium–metal batteries (LMBs) with Li metal anodes of high energy density has long been prevented due to the safety concern of dendrite–related failure. Here a solid–liquid hybrid electrolyte consisting of composite polymer electrolyte (CPE) soaked with liquid electrolyte is reported. The CPE membrane composes of self–healing polymer and Li+–conducting nanoparticles. The electrodeposited lithium metal in a uniform, smooth, and dense behavior is achieved using a hybrid electrolyte, rather than dendritic and pulverized structure for a conventional separator. The Li foil symmetric cells can deliver remarkable cycling performance at ultrahigh current density up to 20 mA cm–2 with an extremely low voltage hysteresis over 1500 cycles. A large areal capacity of 10 mAh cm–2 at 10 mA cm–2 could also be obtained. Furthermore, the Li|Li4Ti5O12 cells based on the hybrid electrolyte achieve a higher specific capacity and longer cycling life than those using conventional separators. The superior performances are mainly attributed to strong adhesion, volume conformity, and self–healing functionality of CPE, providing a novel approach and a significant step toward cost–effective and large–scalable LMBs.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515; 21805185; 2017M621574
OSTI ID:
1528881
Journal Information:
Advanced Science, Vol. 6, Issue 9; ISSN 2198-3844
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 103 works
Citation information provided by
Web of Science

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Cited By (6)

A Game Changer: Functional Nano/Micromaterials for Smart Rechargeable Batteries journal August 2019
In Situ Preparation of Thin and Rigid COF Film on Li Anode as Artificial Solid Electrolyte Interphase Layer Resisting Li Dendrite Puncture journal December 2019
A Lithium‐Ion Pump Based on Piezoelectric Effect for Improved Rechargeability of Lithium Metal Anode journal September 2019
The Failure of Solid Electrolyte Interphase on Li Metal Anode: Structural Uniformity or Mechanical Strength? journal March 2020
A Compact Gel Membrane Based on a Blend of PEO and PVDF for Dendrite‐Free Lithium Metal Anodes journal October 2019
A Lithium-Ion Pump Based on Piezoelectric Effect for Improved Rechargeability of Lithium Metal Anode. text January 2019

Figures / Tables (5)