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Title: Improving the Comprehensive Performance of Na0.7MnO2 for Sodium Ion Batteries by ZrO2 Atomic Layer Deposition

Journal Article · · ACS Applied Materials and Interfaces
 [1];  [2]; ORCiD logo [1]
  1. Missouri Univ. of Science and Technology, Rolla, MO (United States)
  2. Kansas City Plant (KCP), Kansas City, MO (United States)

Sodium ion batteries with Na-Mn-O compounds as cathode have been widely studied as substitutes for lithium ion batteries due to their abundant resources. Still, the relatively poor cycling stability and low capacity of Na-Mn-O compounds significantly limit their applications. Different approaches, including element substitution and surface modification, have been applied to improve the electrochemical performance of those cathode materials. Herein, element doping and coating of ZrO2 on Na0.7MnO2 particles have been achieved by atomic layer deposition (ALD) followed by post-annealing. The rate capability and cycling stability of the modified material were significantly improved, and the mechanism of performance enhancement was revealed. The ZrO2 coatings acted as a stable interfacial layer to enhance the cycling stability of Na0.7MnO2 by suppressing side reactions between the electrode and electrolyte. The doping of transition metal ions reduced energy barriers for sodium ion insertion and deintercalation during cycling, further improving the charge and discharge capacity and rate performance of Na0.7MnO2.

Research Organization:
Kansas City Nuclear Security Campus (KCNSC), Kansas City, MO (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)
Grant/Contract Number:
NA0002839; NSF DMR 1464111
OSTI ID:
1870644
Report Number(s):
NSC-614-3618; DMR 1464111
Journal Information:
ACS Applied Materials and Interfaces, Vol. 13, Issue 46; ISSN 1944-8244
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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