Polarity-Switchable Symmetric Graphite Batteries with High Energy and High Power Densities
Wang G, Wang F, Zhang P, Zhang J, Zhang T, Muellen K, Feng X (2018)
Publication Type: Journal article
Publication year: 2018
Journal
Book Volume: 30
Article Number: 1802949
Journal Issue: 39
Abstract
Multifunctional batteries with enhanced safety performance have received considerable attention for their applications at extreme conditions. However, few batteries can endure a mix-up of battery polarity during charging, a common wrong operation of rechargeable batteries. Herein, a polarity-switchable battery based on the switchable intercalation feature of graphite is demonstrated. The unique redox-amphoteric intercalation behavior of graphite allows a reversible switching of graphite between anode and cathode, thus enabling polarity-switchable symmetric graphite batteries. The large potential gap between anion and cation intercalation delivers a high midpoint device voltage (≈average voltage) of ≈4.5 V. Further, both the graphite anode and cathode are kinetically activated during the polarity switching. Consequently, polarity-switchable symmetric graphite batteries exhibit a remarkable cycling stability (96% capacity retention after 500 cycles), a high power density of 8.66 kW kg−1, and a high energy density of 227 Wh kg−1 (calculated based on the total weight of active materials in both anode and cathode), which are superior to other symmetric batteries and recently reported dual-graphite or dual-carbon batteries. This work will inspire the development of new multifunctional energy-storage devices based on novel materials and electrolyte systems.
Involved external institutions
Technische Universität Dresden
Germany (DE)
Max-Planck-Institut für Polymerforschung (MPI-P) / Max Planck Institute for Polymer Research
Germany (DE)
Germany (DE)
Max-Planck-Institut für Polymerforschung (MPI-P) / Max Planck Institute for Polymer Research
Germany (DE)
How to cite
APA:
Wang, G., Wang, F., Zhang, P., Zhang, J., Zhang, T., Muellen, K., & Feng, X. (2018). Polarity-Switchable Symmetric Graphite Batteries with High Energy and High Power Densities. Advanced Materials, 30(39). https://doi.org/10.1002/adma.201802949
MLA:
Wang, Gang, et al. "Polarity-Switchable Symmetric Graphite Batteries with High Energy and High Power Densities." Advanced Materials 30.39 (2018).
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