Artificial solid electrolyte interphase based on polyacrylonitrile for homogenous and dendrite-free deposition of lithium metal

Xu Hang-Yu^{1, 2}, Li Quan^{1, 2}, Pan Hong-Yi^{1, 2}, Qiu Ji-Liang^{1, 2}, Cao Wen-Zhuo^{1, 2}, Yu Xi-Qian^{1, 2, ‡}, Li Hong^{1, 2, †}

Pristine morphology of Cu electrodes with (a) no coating, (b) pristine PAN coating, and (c) heat-treated PAN coating. Lithium deposition morphology on Cu electrodes with (d) no coating, (e) pristine PAN coating and (f) heat-treated PAN coating. The depositing current density is 0.5mA·cm−2 with a loading capacity of 1.0mAh·cm−2.