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Title: Eliminating Voltage Decay of Lithium-Rich Li1.14Mn0.54Ni0.14Co0.14O2 Cathodes by Controlling the Electrochemical Process

Journal Article · · Chemistry - A European Journal (Online)
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  1. Chinese Academy of Sciences (CAS), Zhejiang (China). Ningbo Inst. of Materials Technology and Engineering
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
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Lithium-rich material owns a particularly high capacity owing to the activation of electrochemical inactive Li2MnO3 phase. But at the same time, MnO2 phase formed after Li2MnO3 activation confronts a severe problem of converting to spinel phase, and resulting in voltage decay. To our knowledge, this phenomenon is inherent property of layered manganese oxide materials and can hardly be overcome. Based on this, unlike previous reports, herein we design a method for the first time to accelerate the phase transformation by tuning the charge upper-limit voltage at a high value, so the phase transformation process can be finished in a few cycles. Then material structure remains stable while cycling at a low upper-limit voltage. By this novel method voltage decay is eliminated significantly.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC00112704
OSTI ID:
1226022
Report Number(s):
BNL-108189-2015-JA; R&D Project: MA015MACA; KC0201010
Journal Information:
Chemistry - A European Journal (Online), Vol. 21, Issue 20; ISSN 1521-3765
Publisher:
ChemPubSoc EuropeCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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Cited By (7)

Ultrafast Heterogeneous Nucleation Enables a Hierarchical Surface Configuration of Lithium-Rich Layered Oxide Cathode Material for Enhanced Electrochemical Performances journal March 2018
Improving the structural stability of Li-rich cathode materials via reservation of cations in the Li-slab for Li-ion batteries journal April 2017
Phase Transformation of Lithium‐rich Oxide Cathode in Full Cell and its Suppression by Solid Electrolyte Interphase on Graphite Anode journal March 2020
High-voltage positive electrode materials for lithium-ion batteries journal January 2017
Phase structure and electrochemical performance control of 0.5Li2MnO3⋅0.5LiNi1/3Co1/3Mn1/3O2 based on the concentration adjustment in a molten salt synthesis system journal April 2017
Li‐ and Mn‐Rich Cathode Materials: Challenges to Commercialization journal December 2016
Weakened Capacity Fading of Li-Rich Cathode via Aqueous Binder for Advanced Lithium Ion Batteries journal January 2019

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