3D Nanotubular Nanoporous N-Doped Graphene with Curvature-Induced Zincophilicity for Ultrafast and Dendrite-Free Zn Deposition

Authors:
Publisher website
Google Scholar
Abstract
Dendrite-free Zn anodes enabling stable cycling at high current densities and capacities remain a critical challenge for zinc-based energy storage. Here, we report a 3D free-standing nanotubular nanoporous N-doped graphene (np-NG) network doped with ultrathin Bi2O3 sheets (np-NG/Bi) as ultrahigh-capacity anode host. The lightweight, binder- and current-collector-free host enables uniform, rapid Zn deposition with near-complete volume utilization. Owing to its mechanical robustness, high conductivity, and large surface area, free-standing np-NG/Bi sustains stable cycling for 4000 h at 5 mA cm–2 (5 mAh cm–2) and over 600 h at 50 mA cm–2 (10 mAh cm–2). The high rate performance is attributed to the highly curved graphene nanotubular architecture and curvature-induced zincophilicity surfaces, which enable a rapid, tube interior-first, and dendrite-free Zn2+ deposition. The superior performance of np-NG/Bi is further demonstrated in Zn-ion and Zn–air batteries, highlighting a 3D graphene design strategy for high-performance Zn metal anodes in next-generation energy systems.
Funding Information
  • Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive Application (ZDSYS20220527171407017)

This publication has 55 references indexed in Scilit: