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Lithicone‐Protected Lithium Metal Anodes for Lithium Metal Batteries with Nickel‐Rich Cathode Materials

Journal Article · · Small Structures
 [1];  [2];  [3];  [4];  [3];  [1];  [1];  [2];  [4];  [1];  [1]
  1. Energy and Environment Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
  2. Department of Mechanical Engineering University of Arkansas Fayetteville AR 72701 USA
  3. Physical and Computational Sciences Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
  4. Environmental Molecular Sciences Laboratory Pacific Northwest National Laboratory Richland WA 99354 USA

The high energy density advantage of lithium (Li) metal batteries (LMBs) makes them increasingly desirable; however, problems such as strong reactivity and dendrite growth of Li metal anode limit their practical uses. In this work, a novel Li‐containing glycerol (LiGL) or lithicone protection layer on a 50 μm thick Li metal anode is employed for improving the performance of LMBs. This LiGL layer was accurately deposited via a molecular layer deposition (MLD) process at 150 °C, using lithium tert‐butoxide and glycerol as precursors. The as‐formed LiGL coating layer is highly tunable in its thickness by simply adjusting MLD cycles and shows a good stability and outstanding ionic transport properties. The LiGL layer is found to effectively mitigate side reactions and enhance cycling stability in both symmetric cells and full cells. Specifically, the LMBs with LiGL@Li anode of 400 MLD cycles and LiNi 0.6 Mn 0.2 Co 0.2 O 2 cathode enable a capacity retention of ≈87%, much higher than ≈35% of the cells with bare Li after 200 cycles at a charge/discharge current density of 2.1 mA cm −2 . This work paves a feasible way for practical LMBs with improved capacity and stability through applying an innovative protection layer on Li metal anodes.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Advance Battery Materials Research (BMR); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC05-76RL01830; SC0023439
OSTI ID:
2403548
Alternate ID(s):
OSTI ID: 2403549
OSTI ID: 2478452
Report Number(s):
PNNL-SA--194098; 2400174
Journal Information:
Small Structures, Journal Name: Small Structures Journal Issue: 11 Vol. 5; ISSN 2688-4062
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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