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Title: Membrane-Free Zn/MnO2 Flow Battery for Large-Scale Energy Storage

Journal Article · · Advanced Energy Materials
ORCiD logo [1];  [2];  [3];  [2];  [2];  [2];  [2];  [2];  [2];  [2]; ORCiD logo [4]; ORCiD logo [5]
  1. Stanford Univ., CA (United States); National Center for Nanoscience and Technology Beijing (People's Republic of China)
  2. Stanford Univ., CA (United States)
  3. Stanford Univ., CA (United States); Beijing Key Lab. of Advanced Chemical Energy Storage Technologies and Materials, Beijing (People's Republic of China)
  4. National Center for Nanoscience and Technology Beijing (People's Republic of China)
  5. Stanford Univ., CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)

The traditional Zn/MnO2 battery has attracted great interest due to its low cost, high safety, high output voltage, and environmental friendliness. However, it remains a big challenge to achieve long-term stability, mainly owing to the poor reversibility of the cathode reaction. Different from previous studies where the cathode redox reaction of MnO2/MnOOH is in solid state with limited reversibility, in this work a new aqueous rechargeable Zn/MnO2 flow battery is constructed with dissolution–precipitation reactions in both cathodes (Mn2+/MnO2) and anodes (Zn2+/Zn), which allow mixing of anolyte and catholyte into only one electrolyte and remove the requirement for an ion selective membrane for cost reduction. Impressively, this new battery exhibits a high discharge voltage of ≈1.78 V, good rate capability (10C discharge), and excellent cycling stability (1000 cycles without decay) at the areal capacity ranging from 0.5 to 2 mAh cm-2. More importantly, this battery can be readily enlarged to a bench scale flow cell of 1.2 Ah with good capacity retention of 89.7% at the 500th cycle, displaying great potential for large-scale energy storage.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Natural Science Foundation of China (NSFC); Beijing Natural Science Foundation; Youth Innovation Promotion Association CAS
Grant/Contract Number:
AC02-76SF00515; 21722102; 51672053; 21303029; 2182087; 2016036
OSTI ID:
1605183
Alternate ID(s):
OSTI ID: 1596386
Journal Information:
Advanced Energy Materials, Vol. 10, Issue 9; ISSN 1614-6832
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 119 works
Citation information provided by
Web of Science

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