3D Nanotubular Nanoporous N-Doped Graphene with Curvature-Induced Zincophilicity for Ultrafast and Dendrite-Free Zn Deposition.
basic_science · Level V
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- Record sourced from PubMed, PMID 42117480.
- Also identified by DOI 10.1021/acs.nanolett.6c01379.
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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 Bi<sub>2</sub>O<sub>3</sub> 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<sup>-2</sup> (5 mAh cm<sup>-2</sup>) and over 600 h at 50 mA cm<sup>-2</sup> (10 mAh cm<sup>-2</sup>). 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 Zn<sup>2+</sup> 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.