An Ion‐Sieving Janus Separator toward Planar Electrodeposition for Deeply Rechargeable Zn‐Metal Anodes

• DOI: 10.1002/adma.202205175
• Publication Date: 2022-07-28T21:40:23Z
• Authors: Xiaotan Zhang; Jiangxu Li; Kaiwen Qi; Yongqiang Yang; Dongyan Liu; Tianqi Wang; Shuquan Liang; Bingan Lu; Yongchun Zhu; Jiang Zhou
• Keywords: Separator (oil production)

The irregular and random electrodeposition of zinc has emerged as a non-negligible barrier for deeply rechargeable aqueous (Zn)-ion batteries (AZIBs), yet traditional texture regulation the Zn substrate cannot continuously induce uniform deposition. Here, Janus separator is constructed via parallelly grown graphene sheets modified with sulfonic cellulose on one side commercial glass fiber through spin-coating technique. can consistently regulate growth toward locked crystallographic orientation Zn(002) to intercept dendrites. Furthermore, spontaneously repel SO42- anchor H+ while allowing effective transport Zn2+ alleviate reactions. Accordingly, symmetric cell harvests long-term lifespan over 1400 h at 10 mA cm-2 /10 mAh endures stable cycling 220 even high depth discharge (DOD) 56%. Zn/carbon nanotube (CNT)-MnO2 achieves an outstanding capacity retention 95% 1 A g-1 after 1900 cycles. Zn/NH4 V4 O10 pouch delivers initial 178 87.4% 260 This work provides continuous approach achieve homogeneity anode, which be suitable other metal batteries.