Docket #: S23-101
An ultra-high areal loading MnO2 electrode
Stanford researchers within the Cui Lab have discovered a promising practical application for grid-scale energy storage by solving poor electronic conductivity in Mn based aqueous batteries, resulting in cycling with an ultrahigh areal loading of 20 mAh cm-2 for over 200 cycles with only 13% capacity loss.
Poor electronic conductivity of electro-deposited MnO2 is a key critical problem that limits the maximum specific areal loading, producing only a thin layer of MnO2 with low areal loading (around 0.005~0.05 mAh cm-2) during the charge/discharge cycle. Stanford researchers discovered, by tuning the temperature, the deposited phase of MnO2 can be manipulated from -?-MnO2 with low conductivity to ?-MnO2 with 2 orders of magnitude increase in conductivity.
Stage of Development
Applications
- Potential use for manganese-hydrogen and manganese-zinc aqueous batteries in grid-scale energy storage
Advantages
- More efficient:
- Can be cycled with 20 mAh cm-2 for over 200 cycles with only 13% capacity loss
- Increase in electronic conductivity of electro-deposited MnO2 by 2-3 orders of magnitudes compared to conventional Mn2+/MnO2 electrode (from 0.005~0.05 mAh cm-2 to 33 mAh cm-2)
- Increase in electronic conductivity by 100~1000 folds compared to other doping methods to modify MnO2 materials, and temperature dependent tuning technique maintains its polymorph during cycling
- Scalable
- Lower overall cost for manganese-based batteries
- Safer than fire-risk lithium-ion batteries
Publications
- Xiao, X., Zhang, Z., Wu, Y., Xu, J., Gao, X., Xu, R., ... & Cui, Y. (2023). Ultrahigh?loading Manganese?based Electrode for Aqueous Battery via Polymorph Tuning. Advanced Materials, 2211555.
Related Links
Similar Technologies
-
Membrane-Free Zn/MnO2 Flow Battery for Large-Scale Energy Storage S19-148Membrane-Free Zn/MnO2 Flow Battery for Large-Scale Energy Storage
-
Stable cycling of lithium sulfide cathodes through strong affinity with multifunctional binders S12-346Stable cycling of lithium sulfide cathodes through strong affinity with multifunctional binders
-
Highly Conducting Solid Electrolytes for Batteries S15-203Highly Conducting Solid Electrolytes for Batteries