Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Stabilizing Anionic Redox Chemistry in a Mn-Based Layered Oxide Cathode Constructed by Li-Deficient Pristine State

Journal Article · · Advanced Materials

Li-rich cathode materials are of significant interest for coupling anionic redox with cationic redox chemistry to achieve high-energy-density batteries. However, lattice oxygen loss and derived structure distortion would induce serious capacity loss and voltage decay, further hindering its practical application. Herein, a novel Li-rich cathode material, O3-type Li0.6[Li0.2Mn0.8]O2, is developed with the pristine state displaying both a Li excess in the transition metal layer and a deficiency in the alkali metal layer. Benefiting from stable structure evolution and Li migration processes, not only can high reversible capacity (≈329 mAh g-1) be harvested but also irreversible/reversible anionic/cationic redox reactions are comprehensively assigned via the combination of in/ex situ spectroscopies. Furthermore, irreversible lattice oxygen loss and structure distortion are effectively restrained, resulting in long-term cycle stability (capacity drop of 0.045% per cycle, 500 cycles). Altogether, tuning the Li state in the alkali metal layer presents a promising way for modification of high-capacity Li-rich cathode candidates.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE) - Office of Vehicle Technologies (VTO); National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); National Science Foundation (NSF)
DOE Contract Number:
AC02-06CH11357
OSTI ID:
1804480
Journal Information:
Advanced Materials, Vol. 33, Issue 2
Publisher:
Wiley
Country of Publication:
United States
Language:
English

References (40)

Reversible anionic redox chemistry in high-capacity layered-oxide electrodes journal July 2013
Enhancing the Kinetics of Li-Rich Cathode Materials through the Pinning Effects of Gradient Surface Na + Doping journal December 2015
Anionic Redox in Rechargeable Lithium Batteries journal June 2017
Cyclic deterioration and its improvement for Li-rich layered cathode material Li[Ni0.17Li0.2Co0.07Mn0.56]O2 journal January 2010
Unified picture of anionic redox in Li/Na-ion batteries journal March 2019
Stabilizing Reversible Oxygen Redox Chemistry in Layered Oxides for Sodium‐Ion Batteries journal February 2020
Evolution of redox couples in Li- and Mn-rich cathode materials and mitigation of voltage fade by reducing oxygen release journal July 2018
Cover Picture: Singlet Fission in Carbene‐Derived Diradicaloids (Angew. Chem. Int. Ed. 20/2020) journal April 2020
Stabilizing the Oxygen Lattice and Reversible Oxygen Redox Chemistry through Structural Dimensionality in Lithium-Rich Cathode Oxides journal February 2019
Tuning Oxygen Redox Chemistry in Li‐Rich Mn‐Based Layered Oxide Cathodes by Modulating Cation Arrangement journal September 2019
Lithium-Doping Stabilized High-Performance P2–Na 0.66 Li 0.18 Fe 0.12 Mn 0.7 O 2 Cathode for Sodium Ion Batteries journal April 2019
Anionic redox processes for electrochemical devices journal January 2016
Superstructure control of first-cycle voltage hysteresis in oxygen-redox cathodes journal December 2019
Lithium Extraction Mechanism in Li-Rich Li 2 MnO 3 Involving Oxygen Hole Formation and Dimerization journal September 2016
The intriguing question of anionic redox in high-energy density cathodes for Li-ion batteries journal January 2016
Oxygen redox chemistry without excess alkali-metal ions in Na2/3[Mg0.28Mn0.72]O2 journal January 2018
Multiple Scattering Calculations of Bonding and X-ray Absorption Spectroscopy of Manganese Oxides journal April 2003
Suppressing Surface Lattice Oxygen Release of Li-Rich Cathode Materials via Heterostructured Spinel Li 4 Mn 5 O 12 Coating journal May 2018
Voltage decay and redox asymmetry mitigation by reversible cation migration in lithium-rich layered oxide electrodes journal January 2020
Unraveling the Cationic and Anionic Redox Reactions in a Conventional Layered Oxide Cathode journal October 2019
Ti‐Gradient Doping to Stabilize Layered Surface Structure for High Performance High‐Ni Oxide Cathode of Li‐Ion Battery journal September 2019
Fundamental interplay between anionic/cationic redox governing the kinetics and thermodynamics of lithium-rich cathodes journal December 2017
Origin of voltage decay in high-capacity layered oxide electrodes journal December 2014
Li2MnO3-stabilized LiMO2 (M = Mn, Ni, Co) electrodes for lithium-ion batteries journal January 2007
Dielectric Polarization in Inverse Spinel‐Structured Mg 2 TiO 4 Coating to Suppress Oxygen Evolution of Li‐Rich Cathode Materials journal April 2020
Exploiting Lithium‐Depleted Cathode Materials for Solid‐State Li Metal Batteries journal June 2019
Coupling between oxygen redox and cation migration explains unusual electrochemistry in lithium-rich layered oxides journal December 2017
Lithium Deficiencies Engineering in Li-Rich Layered Oxide Li 1.098 Mn 0.533 Ni 0.113 Co 0.138 O 2 for High-Stability Cathode journal June 2019
The effect of oxygen vacancy and spinel phase integration on both anionic and cationic redox in Li-rich cathode materials journal January 2020
Electrochemical Reduction of a Spinel-Type Manganese Oxide Cathode in Aqueous Electrolytes with Ca 2+ or Zn 2+ journal February 2018
Mechanism of Electrochemical Activity in Li 2 MnO 3 journal May 2003
A Hollow Multi‐Shelled Structure for Charge Transport and Active Sites in Lithium‐Ion Capacitors journal January 2020
Direct observation of reversible oxygen anion redox reaction in Li-rich manganese oxide, Li 2 MnO 3 , studied by soft X-ray absorption spectroscopy journal January 2016
Tuning Anionic Redox Activity and Reversibility for a High‐Capacity Li‐Rich Mn‐Based Oxide Cathode via an Integrated Strategy journal March 2019
In Situ XRD and Electrochemical Study of the Reaction of Lithium with Amorphous Silicon journal January 2004
Exploring reversible oxidation of oxygen in a manganese oxide journal January 2016
Suppression of Voltage Decay through Manganese Deactivation and Nickel Redox Buffering in High-Energy Layered Lithium-Rich Electrodes journal May 2018
Studies of the layered manganese bronzes, Na2/3[Mn1−xMx]O2 with M=Co, Ni, Li, and Li2/3[Mn1−xMx]O2 prepared by ion-exchange journal November 1999
First-charge instabilities of layered-layered lithium-ion-battery materials journal January 2015
Quantifying the Capacity Contributions during Activation of Li 2 MnO 3 journal January 2020