期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 6, 期 10, 页码 4313-4323出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta00221e
关键词
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资金
- National Natural Science Foundation of China [51725401]
- Fundamental Research Funds for the Central Universities [FRF-TP-15-002C1, FRF-TP-17-002C2]
The volume expansion of the electrodes and gas generation are still challenges for the current dual-ion batteries. Herein, we report a novel room temperature solid state dual-ion battery based on gel electrolytes. The dual-ion battery delivers a high reversible capacity of similar to 80 mA h g(-1), with excellent rate performance and long-term cycling stability. Moreover, the battery displays a high working voltage of 4.2 V, which enables to improve the application value of the battery. Typically, the problem of gas generation is further reduced by altering the charge cut-off voltage with gel electrolytes. First-principles simulations are performed to elucidate the anion intercalation behavior in a graphite cathode, demonstrating that the anion-intercalated graphite is stable without obvious distortion, and small activation energy barriers and fast ion-diffusivity are also reported. These convincing results indicate that this dual-ion battery is promising and environmentally friendly for future energy storage applications.
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