Development of Safe and Sustainable Dual-Ion Batteries Through Hybrid Aqueous/Nonaqueous Electrolytes
- Univ. of Münster (Germany)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Forschungszentrum Juelich, Münster (Germany)
In this study, a new dual-ion battery (DIB) concept based on an aqueous/non-aqueous electrolyte is reported, combining high safety in the form of a nonflammable water-in-salt electrolyte, a high cathodic stability by forming a protective interphase on the negative electrode (non-aqueous solvent), and improved sustainability by using a graphite-based positive electrode material. Far beyond the anodic stability limit of water, the formation of a stage-2 acceptor-type graphite intercalation compound (GIC) of bis(trifluoromethanesulfonyl) imide (TFSI) anions from an aqueous-based electrolyte is achieved for the first time, as confirmed by ex-situ X-ray diffraction. The choice of negative electrode material shows a huge impact on the performance of the DIB cell chemistry, i.e., discharge capacities up to 40 mAh g–1 are achieved even at a high specific current of 200 mA g–1. In particular, lithium titanium phosphate (LiTi2(PO4)3; LTP) and lithium titanium oxide (Li4Ti5O12; LTO) are evaluated as negative electrodes, exhibiting specific advantages for this DIB setup. In this work, a new DIB storage concept combining an environmentally friendly, transition-metal-free, abundant graphite positive electrode material, and a nonflammable water-based electrolyte is established, thus paving the path toward a sustainable and safe alternative energy storage technology.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE Laboratory Directed Research and Development (LDRD) Program; German Federal Ministry of Education and Research (BMBF); Ministry of Economic Affairs, Innovation, Digitalization and Energy of the State of North Rhine-Westphalia (MWIDE)
- Grant/Contract Number:
- AC05-76RL01830; 03XP0118; 313-W044A
- OSTI ID:
- 1719113
- Report Number(s):
- PNNL-SA-145659
- Journal Information:
- Advanced Energy Materials, Vol. 10, Issue 8; ISSN 1614-6832
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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