Designing In-Situ-Formed Interphases Enables Highly Reversible Cobalt-Free LiNiO2 Cathode for Li-ion and Li-metal Batteries
Cathode materials control both the energy density and cost of Li-ion and Li-metal batteries. The cobalt-free LiNiO2 with relatively low cost and extremely high theoretical energy density (~1,050 Wh kg–1) is one of the most promising cathode materials for high-energy batteries. However, the continuous Ni dissolution, structural disordering, particle cracking, and unstable cathode electrolyte interphase (CEI) hinder its applications. Here, we surmount these challenges by forming a robust fluoride (F)- and boron (B)-rich CEI on LiNiO2 using a high-fluorinated electrolyte with LiDFOB additive. The LiNiO2 cathode maintains an unprecedentedly high capacity retention of >80% after 400 deep cycles at a high charge cut-off voltage of 4.4 V (versus Li/Li+). In addition, the electrolyte forms an F- and B-rich interphase on the Li metal and graphite anodes, allowing stable cycling of full cells. Here, this work sheds light on designing interfacial chemistry for high-energy cathodes, and its principle is applicable for other alkali metal ion cathodes.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1708967
- Alternate ID(s):
- OSTI ID: 1566883; OSTI ID: 1570533
- Report Number(s):
- BNL-212098-2019-JAAM; S2542435119303794; PII: S2542435119303794
- Journal Information:
- Joule, Journal Name: Joule Vol. 3 Journal Issue: 10; ISSN 2542-4351
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Enabling a Durable Electrochemical Interface via an Artificial Amorphous Cathode Electrolyte Interphase for Hybrid Solid/Liquid Lithium‐Metal Batteries
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journal | February 2020 |
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