Title: Boosting High-Rate Zinc-Storage Performance by the Rational Design of Mn2O3 Nanoporous Architecture Cathode

Journal Article · · Nano-Micro Letters
 [1];  [2];  [3];  [4];  [5];  [2];  [6]
  1. Jilin Univ. (China). College of Chemistry. State Key Lab. of Inorganic Synthesis and Preparative Chemistry; OSTI
  2. Jilin Univ. (China). College of Chemistry. State Key Lab. of Inorganic Synthesis and Preparative Chemistry
  3. Jilin Univ. (China). College of Chemistry. State Key Lab. of Supramolecular Structure and Materials
  4. Shanghai Univ. (China). Materials Genome Inst.
  5. Chinese Academy of Sciences, Changchun (China). Changchun Inst. of Applied Chemistry. State Key Lab. of Rare Earth Resource Utilization
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division
+ Show Author Affiliations

Manganese oxides are regarded as one of the most promising cathode materials in rechargeable aqueous Zn-ion batteries (ZIBs) because of the low price and high security. However, the practical application of Mn2O3 in ZIBs is still plagued by the low specific capacity and poor rate capability. Herein, highly crystalline Mn2O3 materials with interconnected mesostructures and controllable pore sizes are obtained via a ligand-assisted self-assembly process and used as high-performance electrode materials for reversible aqueous ZIBs. The coordination degree between Mn2+ and citric acid ligand plays a crucial role in the formation of the mesostructure, and the pore sizes can be easily tuned from 3.2 to 7.3 nm. Ascribed to the unique feature of nanoporous architectures, excellent zinc-storage performance can be achieved in ZIBs during charge/discharge processes. The Mn2O3 electrode exhibits high reversible capacity (233 mAh g-1at 0.3 A g-1), superior rate capability (162 mAh g-1 retains at 3.08 A g-1) and remarkable cycling durability over 3000 cycles at a high current rate of 3.08 A g-1. Moreover, the corresponding electrode reaction mechanism is studied in depth according to a series of analytical methods. These results suggest that rational design of the nanoporous architecture for electrode materials can effectively improve the battery performance.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
National Natural Science Foundation of China (NSFC); USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1815920
Journal Information:
Nano-Micro Letters, Journal Name: Nano-Micro Letters Journal Issue: 1 Vol. 12; ISSN 2311-6706
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Cathode material
High-rate capability
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Zn-ion battery
Zn-storage mechanism