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Dual Sn‐Zn Atomic Decorated Hierarchy Carbon Meta‐Material: Enabling High‐Rate and Low‐Temperature Anode‐Less Na Metal Batteries

二元Sn-Zn原子配置階層カーボンメタマテリアル：高速充放電・低温作動可能なアノードフリーナトリウム金属電池を実現 (AI 翻訳)

Feiyang Yan, Huan Liu, Jing Wan, Xueping Sun, Jiahuan Luo, Yue Wang, S Y Sun, Junwei Lang

Advanced Functional Materials📚 査読済 / ジャーナル2026-05-04#エネルギー転換Origin: CN
DOI: 10.1002/adfm.75720
原典: https://doi.org/10.1002/adfm.75720

🤖 gxceed AI 要約

日本語

本研究では、グアニン系水素結合有機構造体（HOF）を前駆体として、Sn-Zn原子が配置された多孔質窒素リッチカーボンメタマテリアル（SA-NCS）を合成し、ナトリウム金属電池の負極ホスト材料として利用した。SA-NCSは高い親ナトリウム性サイトを提供し、デンドライト状析出を抑制して二次元的な緻密な析出を促進する。SA-NCS@Cu集電体は20 mA cm⁻²の高電流密度で22 mVの低い核形成過電圧を示し、10 mA cm⁻²で2000時間の安定動作と99.9%超のクーロン効率を達成した。さらに、−20°Cでも優れた高速充放電性能と長寿命を示し、高性能ナトリウム金属電池の実現に貢献する。

English

This study introduces a Sn-Zn atomic configured porous nitrogen-rich carbon meta-material (SA-NCS) derived from a guanine-based hydrogen-bonded organic framework (HOF) as a sodium host for anode-less sodium metal batteries. The material provides high-density sodiophilic sites, promoting planar deposition and suppressing dendrites. The SA-NCS@Cu current collector achieves an ultralow nucleation overpotential of 22 mV at 20 mA cm⁻², stable cycling for 2000 h at 10 mA cm⁻² with >99.9% Coulombic efficiency, and excellent fast-charging capability at −20°C.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

本研究成果は、次世代蓄電池として期待されるナトリウム金属電池の実用化に向けた重要な進展である。日本では再生可能エネルギーの導入拡大に伴い、大規模蓄電システムの需要が高まっており、本材料は低温・高速充放電性能に優れることから、日本のエネルギー貯蔵戦略において有力な選択肢となり得る。

In the global GX context

This paper presents a significant advance in sodium metal battery technology, which is crucial for large-scale energy storage to support renewable energy integration. The demonstrated high-rate and low-temperature performance addresses key barriers for practical application, making it relevant to global efforts in energy transition and grid-scale storage. The novel material design could influence future battery development for electric vehicles and stationary storage.

👥 読者別の含意

🔬研究者:Materials scientists and battery researchers can learn about a new sodium host material design that enhances performance at high rates and low temperatures.

🏢実務担当者:Companies involved in battery manufacturing or energy storage systems may consider this material for developing next-generation sodium batteries with improved fast-charging and cold-weather capabilities.

🏛政策担当者:Policymakers focusing on energy storage and electrification should note that sodium metal batteries are progressing toward practical viability, potentially offering a cost-effective alternative to lithium-ion for certain applications.

📄 Abstract（原文）

ABSTRACT Sodium metal batteries (SMBs) are regarded as promising candidates for next‐generation energy storage technologies due to their high energy density and low cost yet remain challenging owing to dendritic sodium deposition, unstable electrode–electrolyte interfaces, and sluggish ion transport, particularly under fast‐charging conditions or at low operating temperatures. To address these challenges, in this study, we introduce Sn‐Zn atomic configured porous, nitrogen‐rich carbon‐based meta‐material (SA‐NCS), derived from a guanine‐based hydrogen‐bonded organic framework (HOF), serving as sodium host material for SMBs, which provides a high density of atomic sodiophilic sites to promote the transition from one‐dimensional dendritic deposition to two‐dimensional planar‐oriented dense plating, and features programmable nano‐to‐macro functional structures capable of effectively accommodating the anodic volume fluctuation induced by sodium plating and stripping. SA‐NCS@Cu current collector exhibits an ultralow nucleation overpotential of 22 mV even at a high current density of 20 mA cm −2 and delivers exceptional cycling stability, enabling stable operation for 2000 h at 10 mA cm −2 with Coulombic efficiencies exceeding 99.9%. Moreover, the SA‐NCS @Cu current collector based anode‐less sodium metal batteries demonstrate a superior fast‐charging capability and long‐term cycling stability at −20°C. This study presents a practical design for sodium hosts, enabling high‐performance SMBs.

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