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High-performance heterostructured cathodes for lithium-ion batteries with a Ni-rich layered oxide core and a Li-rich layered oxide shell

Journal Article · · Advanced Science
 [1];  [2];  [2];  [3];  [3];  [2]
  1. The Univ. of Texas, Austin, TX (United States); Univ Texas Austin, Mat Sci & Engn Program, Austin, TX 78712 USA
  2. The Univ. of Texas, Austin, TX (United States)
  3. Ulsan National Institute of Science and Technology (UNIST), Ulsan (South Korea)
+ Show Author Affiliations
The Ni-rich layered oxides with a Ni content of >0.5 are drawing much attention recently to increase the energy density of lithium-ion batteries. However, the Ni-rich layered oxides suffer from aggressive reaction of the cathode surface with the organic electrolyte at the higher operating voltages, resulting in consequent impedance rise and capacity fade. To overcome this difficulty, we present here a heterostructure composed of a Ni-rich LiNi0.7Co0.15Mn0.15O2 core and a Li-rich Li1.2-xNi0.2Mn0.6O2 shell, incorporating the advantageous features of the structural stability of the core and chemical stability of the shell. With a unique chemical treatment for the activation of the Li2MnO3 phase of the shell, a high capacity is realized with the Li-rich shell material. Aberration-corrected scanning transmission electron microscopy (STEM) provides direct evidence for the formation of surface Li-rich shell layer. Finally, the heterostructure exhibits a high capacity retention of 98% and a discharge- voltage retention of 97% during 100 cycles with a discharge capacity of 190 mA h g-1 (at 2.0–4.5 V under C/3 rate, 1C = 200 mA g-1).
Research Organization:
Univ. of Texas, Austin, TX (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
EE0006447
OSTI ID:
1363894
Journal Information:
Advanced Science, Journal Name: Advanced Science Journal Issue: 11 Vol. 3; ISSN 2198-3844
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (19)

Synchronous Tailoring Surface Structure and Chemical Composition of Li-Rich-Layered Oxide for High-Energy Lithium-Ion Batteries journal August 2018
Tuning Anionic Redox Activity and Reversibility for a High‐Capacity Li‐Rich Mn‐Based Oxide Cathode via an Integrated Strategy journal March 2019
Surface/Interface Structure Degradation of Ni‐Rich Layered Oxide Cathodes toward Lithium‐Ion Batteries: Fundamental Mechanisms and Remedying Strategies journal December 2019
Advanced Lithium-Ion Batteries for Practical Applications: Technology, Development, and Future Perspectives journal July 2018
Surface Engineering Strategies of Layered LiCoO 2 Cathode Material to Realize High-Energy and High-Voltage Li-Ion Cells journal October 2016
Recent Developments on and Prospects for Electrode Materials with Hierarchical Structures for Lithium-Ion Batteries journal November 2017
Extending the Service Life of High-Ni Layered Oxides by Tuning the Electrode-Electrolyte Interphase journal September 2018
A Comprehensive Analysis of the Interphasial and Structural Evolution over Long‐Term Cycling of Ultrahigh‐Nickel Cathodes in Lithium‐Ion Batteries journal October 2019
Multishelled Ni x Co 3- x O 4 Hollow Microspheres Derived from Bimetal-Organic Frameworks as Anode Materials for High-Performance Lithium-Ion Batteries journal February 2017
Improving rate performance of cathode material Li1.2Mn0.54Co0.13Ni0.13O2 via niobium doping journal February 2018
Artificial interphase engineering of electrode materials to improve the overall performance of lithium-ion batteries journal August 2017
Li-Rich Layered Oxides and Their Practical Challenges: Recent Progress and Perspectives journal March 2019
Degradation Mechanisms and Mitigation Strategies of Nickel-Rich NMC-Based Lithium-Ion Batteries journal October 2019
Dynamic behaviour of interphases and its implication on high-energy-density cathode materials in lithium-ion batteries journal April 2017
High-voltage positive electrode materials for lithium-ion batteries journal January 2017
Comparison of electrochemical performance of LiNi 1−x Co x O 2 cathode materials synthesized from coated (1− x )Ni(OH) 2 @ x Co(OH) 2 and doped Ni 1−x Co x (OH) 2 precursors journal January 2019
Advanced cathode materials and efficient electrolytes for rechargeable batteries: practical challenges and future perspectives journal January 2019
Enhanced high-voltage cycling stability of Ni-rich cathode materials via the self-assembly of Mn-rich shells journal January 2019
Ultrathin Al2O3 Coating on LiNi0.8Co0.1Mn0.1O2 Cathode Material for Enhanced Cycleability at Extended Voltage Ranges journal February 2019

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Related Subjects

25 ENERGY STORAGE
chemical activation
heterostructure
lithium-rich layered oxide
nickel-rich layered oxide
surface stabilization