Membrane-Free Zn/MnO2 Flow Battery for Large-Scale Energy Storage
Journal Article
·
· Advanced Energy Materials
- Stanford Univ., CA (United States); National Center for Nanoscience and Technology Beijing (People's Republic of China)
- Stanford Univ., CA (United States)
- Stanford Univ., CA (United States); Beijing Key Lab. of Advanced Chemical Energy Storage Technologies and Materials, Beijing (People's Republic of China)
- National Center for Nanoscience and Technology Beijing (People's Republic of China)
- 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:
- Beijing Natural Science Foundation; National Natural Science Foundation of China (NSFC); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; Youth Innovation Promotion Association CAS
- Grant/Contract Number:
- AC02-76SF00515
- OSTI ID:
- 1605183
- Alternate ID(s):
- OSTI ID: 1596386
- Journal Information:
- Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 9 Vol. 10; ISSN 1614-6832
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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Tue Oct 17 20:00:00 EDT 2023
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OSTI ID:2203023