.png){kind=icon}
.png){kind=icon}
Return
A High-Voltage, Dendrite-Free, and Durable Zn-Graphite Battery
.png){kind=icon}
OA
AI
DOI：10.1002/adma.201905681.png)
.png){kind=icon}
.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
The intrinsic advantages of metallic Zn, like high theoretical capacity (820 mAh g(-1)), high abundance, low toxicity, and high safety have driven the recent booming development of rechargeable Zn batteries. However, the lack of high-voltage electrolyte and cathode materials restricts the cell voltage mostly to below 2 V. Moreover, dendrite formation and the poor rechargeability of the Zn anode hinder the long-term operation of Zn batteries. Here a high-voltage and durable Zn-graphite battery, which is enabled by a LiPF6-containing hybrid electrolyte, is reported. The presence of LiPF6 efficiently suppresses the anodic oxidation of Zn electrolyte and leads to a super-wide electrochemical stability window of 4 V (vs Zn/Zn2+). Both dendrite-free Zn plating/stripping and reversible dual-anion intercalation into the graphite cathode are realized in the hybrid electrolyte. The resultant Zn-graphite battery performs stably at a high voltage of 2.8 V with a record midpoint discharge voltage of 2.2 V. After 2000 cycles at a high charge-discharge rate, high capacity retention of 97.5% is achieved with approximate to 100% Coulombic efficiency.
Keywords:
anion intercalation
dendrite-free
dual-ion batteries
graphite cathodes
Zn batteries
AI Summary
Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.
Journal
IF:
26.8
Papers:
3.4W
Citations:
46.0W
View more organizations