Defect Engineering of Carbon Frameworks Driven All‐Slope Hard Carbon Anodes for Fast‐Charging Sodium‐Ion Batteries
欠陥工学による炭素骨格駆動の全傾斜ハードカーボン負極：急速充電ナトリウムイオン電池向け (AI 翻訳)
Qixin Liu, Chengying Zeng, Shuohui Zhang, Fanda Zeng, Jiahe Chen, Lulu Zhang, Cuihua Kang, Daping Qiu, Xuelin Yang
🤖 gxceed AI 要約
日本語
本研究は、ナトリウムイオン電池（SIB）の急速充電性能を向上させるため、ハードカーボン負極の欠陥工学を提案する。前炭化温度を調整することで、高い初期クーロン効率（90.3%）と優れた急速充電容量（50 A g⁻¹で150 mAh g⁻¹）を達成した。in situラマン分光法と理論計算により、欠陥サイトの貯蔵機構を解明し、ハイブリッドキャパシタでも高エネルギー・高出力密度を示した。
English
This study proposes defect engineering of hard carbon anodes to enhance fast-charging performance of sodium-ion batteries (SIBs). By tuning pre-carbonization temperature, they achieved high initial Coulombic efficiency (90.3%) and excellent fast-charging capacity (150 mAh g⁻¹ at 50 A g⁻¹). In situ Raman and theoretical calculations reveal the storage mechanism, and a hybrid capacitor shows high energy/power densities.
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
日本のGX文脈では、蓄電池の性能向上は再生可能エネルギーの普及やEV普及に寄与するが、本論文は材料科学の基礎研究であり、直接的な政策・開示関連ではない。日本企業にとっては、次世代電池の技術動向として参考になる。
In the global GX context
In the global GX context, this paper contributes to the advancement of sodium-ion batteries, which are relevant for grid storage and EV applications, supporting the energy transition. However, it is a materials science study with no direct link to climate disclosure or policy frameworks.
👥 読者別の含意
🔬研究者:Materials scientists and battery researchers can gain insights into defect engineering strategies for high-performance anodes.
🏢実務担当者:Battery manufacturers and energy storage companies may find this relevant for developing next-generation battery technologies.
📄 Abstract（原文）
ABSTRACT Fast‐charging capability is one of the crucial factors determining the application prospects of sodium‐ion batteries (SIBs). Nevertheless, the mismatched sodium storage kinetics and Coulombic efficiency (CE) in hard carbon anodes are bottlenecks in the implementation of fast‐charging SIBs. Herein, we propose a facile pre‐carbonization strategy to precisely tailor the intrinsic structure of hard carbon, enabling the simultaneous achievement of high fast‐charging sodium storage capacity and superior initial CE in hard carbon (EHC‐ X ) anodes. Through comprehensive structural characterizations, the regulation mechanism of pre‐carbonization temperature on the intrinsic structure of EHC‐ X is elucidated. As an anode for SIBs, EHC‐8, which features the lowest graphitization degree and highest mesopore volume, delivers an ultra‐high initial CE (90.3%) and exceptional fast‐charging sodium storage capacity (150 mAh g −1 at 50 A g −1 with a recharge time of ∼10.8 s). Combined in situ Raman spectroscopy, theoretical calculations, and ex‐situ characterizations, the fast‐charging sodium storage mechanism of defect sites in EHC‐8 is revealed. Furthermore, a sodium‐ion hybrid capacitor fabricated with the EHC‐8 anode delivers ultra‐high energy/power densities (175 Wh kg −1 /48.2 kW kg −1 ), along with acceptable fast‐charging cycling stability. This work provides theoretical and methodological guidance for the construction of fast‐charging hard carbon anodes based on defect engineering.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1002/rar2.70462first seen 2026-08-08 05:03:42
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