TY  - JOUR
AU  - Chen, Kaizhi
AU  - Xia, Xianming
AU  - Ma, Huaguang
AU  - Xu, Shitan
AU  - Yao, Yu
AU  - Rui, Xianhong
AU  - Yu, Yan
PY  - 2023
TI  - Sodiophilic V2O3-Inducing Layer for Long Lifespan and Dendrite-Free Sodium Metal Anodes
JO  - Energy Material Advances
SN  - 2097-1133
SP  - 0063
VL  - 4
AB  - Because of the superiority of low cost and high theoretical capacity, sodium metal batteries are considered an attractive option for high energy storage. However, the uncontrollable and random deposition of Na tends to expedite the formation of Na dendrites and increases the risk of thermal runaway. The method of preplant sodiophilic sites can induce the lateral deposition of Na instead of sharp dendrite emergence. Here, we introduce the sodiophilic V2O3 particles to form a protective layer on Na surface (Na/V2O3). The high Na ion adsorption energy and low nucleation overpotential of Na/V2O3 facilitate the diffusion of Na ions and homogeneous Na deposition, which can work well in cubing dendrite development. Thus, the symmetrical cell (Na/V2O3||Na/V2O3) can stably operate for 670 h at 0.5 mA·cm−2/1 mAh·cm−2 with a smaller voltage hysteresis (less than 100 mV). Moreover, full cell constructed by coupling Na/V2O3 anode with Na3V2(PO4)3 cathode displays an outstanding rate performance, maintaining a high capacity of 70 mAh·g−1 at 30 C. On the basis of the design of sodiophilic protection layer, a dendrite-free, outstanding rate performance, and long lifespan sodium metal battery is realized.
UR  - https://doi.org/10.34133/energymatadv.0063
DO  - 10.34133/energymatadv.0063