Journal
ADVANCED ENERGY MATERIALS
Volume 9, Issue 29, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201901099
Keywords
batteries; calcium; energy storage; room-temperature
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Funding
- National Natural Science Foundation of China [51822210]
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Calcium-ion batteries (CIBs) are promising energy storage devices due to the merits of natural abundance, similar standard reduction potential to lithium, and bivalent-ion characteristic of calcium. However, the development of CIBs is hindered by the low rate capability and poor cycling performance at room temperature. Here, a highly reversible room-temperature calcium-ion based hybrid battery is realized by a tri-ion strategy, which significantly improves the diffusion kinetics of calcium ions. The optimized CIB shows high rate capability of 15 C as well as excellent cycling stability over 1500 cycles with 86% capacity retention at 5 C, at room temperature, which is the best result of reported calcium-ion based full batteries.
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