posted on 2021-05-11, 02:03authored byBinghang Liu, Jinming Yue, Tianshi Lv, Shu Wang, Anxing Zhou, Xiaolin Xiong, Liumin Suo
Current collector
corrosion in the aqueous electrolyte is a critical
but easily overlooked issue impacting the cycling life, efficiency,
and capacity utilization of aqueous batteries. So far, there is no
metal-based current collector intrinsically stable in the aqueous
electrolyte due to the highly corrosive aggressive nature of the aqueous
environment. Thus, it is critical to find an easy-made, lightweight,
commercially available, and extremely corrosion-resistant current
collector for aqueous batteries. Here, we designed a corrosion-resistant
and easy-made current collector with the carbon black/polyethylene
composite (CBPE)-metal-CBPE (CMC) sandwich structure, including the
CBPE in the outer layer as the waterproof layer and the superior electronic
conducting metal in the inner layer offering a fast electronic pathway.
Combining carbon and metal, our CMC current collector has not only
superior corrosion-resistance against the aqueous electrolyte but
also high electronic conductivity comparable to the current metal
collector, which is favorable to improve the electrochemical performance
of aqueous Li-ion batteries.