Hard Carbon Networks for Mitigating Graphite Lattice Strain Under Extreme‑Low‑Temperature Fast Charging
極低温急速充電時の黒鉛格子ひずみを緩和するハードカーボンネットワーク (AI 翻訳)
Lei Wang, Can Wang, Fu‐Da Yu, Lan‐Fang Que, Xiang‐Gong Zhang, Ke-Yu Xie
🤖 gxceed AI 要約
日本語
リチウムイオン電池の低温急速充電を制約する黒鉛負極の反応速度と機械的劣化に対し、黒鉛マトリックスに15wt%のハードカーボン（HC）ネットワークを埋め込む戦略を提案。HCネットワークがイオンフラックスを再分配し、高ひずみ相転移を抑制して黒鉛の粉砕を防ぐ。さらにLiFリッチなSEI形成を促進し、界面剥離を防止。NCM523‖Graphite/HCパウチセルは-20°C・4Cレートで2250サイクル、88%容量維持を達成し、-40°C・8Cでも安定動作。全気候・高出力EV電池へのスケーラブルな設計原理を提供する。
English
This paper proposes embedding a 15 wt.% hard carbon (HC) percolating network in graphite anodes to overcome slow kinetics and mechanical degradation during low-temperature fast charging. The HC network redistributes ionic flux, suppresses high-strain phase transition to LiC6, and promotes a robust LiF-rich SEI, preventing pulverization and delamination. NCM523||Graphite/HC pouch cells achieve 2250 cycles at -20°C and 4C with 88% capacity retention, and stable operation at 8C and -40°C. This offers a scalable design for all-climate, high-power EV batteries.
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EV市場では、寒冷地での航続距離と急速充電性能が普及の鍵。本技術は低温性能を向上させ、EVの実用性を高めることで、運輸部門の脱炭素化に貢献する。SSBJ開示やカーボンニュートラル戦略の文脈では、EV普及を支える基盤技術として注目される。
In the global GX context
Globally, the transition to electric vehicles is critical for decarbonizing transport. This battery technology addresses a key barrier—low-temperature fast charging—enhancing EV viability in cold climates. It aligns with global efforts to improve battery performance and reduce range anxiety, supporting the broader energy transition.
👥 読者別の含意
🔬研究者:Provides a novel material design for low-temperature fast-charging batteries, relevant for EV battery research.
🏢実務担当者:Offers a scalable approach to improve battery performance in cold climates, potentially useful for EV manufacturers and battery suppliers.
📄 Abstract（原文）
ABSTRACT Low‐temperature fast charging of lithium‐ion batteries is primarily constrained by sluggish reaction kinetics and mechanical degradation of graphite anodes. Here, a kinetic–structural coordination strategy based on a 15 wt.% hard carbon (HC) percolating network embedded within the graphite matrix is proposed. This HC network functions as an ionic flux redistributor, effectively suppressing the high‐strain phase transition to stage 1 (LiC 6 ) and reducing lattice strain, thereby protecting the graphite from mechanical pulverization. Moreover, the coordinated lithiation promotes the formation of a robust, LiF‐rich inorganic solid electrolyte interphase (SEI), which facilitates fast desolvation and prevents interfacial delamination. As a result, NCM523‖Graphite/HC pouch cells deliver 2250 cycles at −20°C under a 4C rate with 88% capacity retention, and maintain stable operation at 8C and −40°C. This network doping approach thus provides a scalable design principle for all‐climate, high‐power batteries intended for electric vehicle applications.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1002/aenm.71446first seen 2026-08-17 04:59:39
🔔 こうした論文の新着を逃したくない方は キーワードアラート に登録（無料・3キーワードまで）。
gxceed は公開メタデータに基づく研究支援データセットです。要約・翻訳・解説は AI 支援で生成されています。 最終的な解釈・検証は利用者が原典資料に基づいて行うことを前提とします。