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『水系锌碘』郑州轻工业大学 Advanced Functional Materials:二维导电 Cu-MOF 双电极协同调控,赋能高负载锌碘电池

  • 2026-04-16 03:12:05
『水系锌碘』郑州轻工业大学 Advanced Functional Materials:二维导电 Cu-MOF 双电极协同调控,赋能高负载锌碘电池
【背景挑战】
水系锌碘电池以高安全、低成本、环境友好成为大规模储能优选,但正极碘穿梭效应、转化动力学迟缓与负极锌枝晶生长、析氢腐蚀、副反应泛滥两大核心难题共存。传统策略仅单独调控正极或负极,无法实现双电极协同优化;高负载工况下,碘利用率暴跌、锌负极失效加速,电池容量、循环与倍率全面崩塌,严重制约实用化。常规 MOF 材料导电性差、活性位点不足,难以同时满足碘吸附催化与锌负极均匀沉积需求,高负载锌碘电池缺乏高效多功能调控介质。
【文献导入】
单一调控正极或负极无法破解高负载锌碘电池性能瓶颈。本研究创新设计二维导电 Cu-MOFCu₃(HHTP)₂)多功能调控剂,同时作用于碘正极与锌负极:正极侧,利用 Cu-O₄配位位点强化学吸附定多碘化物,催化碘快速转化,抑制穿梭、提升利用率;负极侧,优化 Zn²⁺溶剂化结构,诱导均匀沉积,抑制枝晶、析氢与腐蚀。基于双电极协同调控,高负载锌碘电池实现高容量、超稳长循环、优异倍率,3×3 cm² 软包电池稳定运行 500 圈,为高负载水系锌碘电池提供全新解决方案。
【创新点】
设计理念创新:首次提出二维导电 Cu-MOF 双电极协同调控策略,一体化解决正极碘穿梭与负极锌枝晶两大难题,突破单一调控局限;
作用机制创新:Cu-O₄配位中心作为双功能活性位点,正极强吸附 + 催化碘转化,负极均化电场 + 诱导均匀沉积,同步优化双电极界面;
性能突破:实现8.0 mg cm⁻² 超高碘负载稳定运行,10C  2500 圈长循环,软包电池 500 圈无衰减,综合性能领跑高负载锌碘电池
【图文详解】
 1 二维导电 Cu-MOF 结构与形貌表征
 1. (A) Cu-MOF  XRD 图谱;(B) HHTP 配体与 Cu-MOF  FTIR 对比;(C) Raman 光谱;(D–F) Cu 2pC 1sO 1s XPS 谱图;(G–I) SEM  EDS 元素分布。
精准证实材料成功合成:
物相纯正:XRD 特征峰与 Cu₃(HHTP)₂标准谱完全匹配,结晶度高;
配位确认:FTIR  XPS 证实 Cu 与配体去质子化羟基形成 Cu-O 配位,Cu  + 2 价为主、微量 + 1 价;
形貌均匀:二维片状结构,CuC元素均匀分布,多孔结构暴露丰富 Cu-O₄活性位点。
 2 Cu-MOF 作为正极调控剂的电化学性能
 2. (A) 1C 循环性能对比;(B) 1C 充放电曲线;(C) 倍率性能;(D) 不同倍率充放电曲线;(E) 10C 长循环对比;(F) CV 等高线图;(G) 电容贡献;(H,I) 多碘化物紫外吸附光谱。
系统验证正极调控效果:
容量与循环:wt% Cu-MOF 最优,1C 容量 173.6 mAh g⁻¹200 圈保持 127.6 mAh g⁻¹10C 循环 1000 圈容量 84.4 mAh g⁻¹,远超空白组;
动力学优化:氧化还原峰电流提升、极化降低,离子扩散更快、电荷转移电阻更小;
穿梭抑制:紫外光谱证实 Cu-MOF  I₃⁻强吸附,多碘化物溶解穿梭被彻底阻断。
 3 Cu-MOF 作为负极调控剂的锌沉积行为
 3. (A,B) 1/2 mA cm⁻² 对称电池循环;(C) 倍率性能;(D) Tafel 腐蚀曲线;(E) LSV 析氢曲线;(F) 锌成核 CV 曲线;(G) 锌负极沉积 SEM 对比;(H) 锌负极浸泡 XRD(I) Zn²⁺脱溶剂化能垒。
全面证实负极保护机制:
超长稳定:对称电池 600 h 无短路,空白组 145 h 即失效;
腐蚀与析氢抑制:腐蚀电流降低,析氢过电位提升 30 mV,副反应被显著遏制;
沉积均匀:表面平整致密、无枝晶,无碱式硫酸锌副产物;
传输加速:脱溶剂化活化能降至 26.18 kJ mol⁻¹Zn²⁺迁移更快。
 4 DFT 理论计算揭示双功能调控机制
 4. (A) Cu-MOF 静电势分布;(B) 碘物种吸附能对比;(C) 碘转化吉布斯自由能曲线;(D) 电荷密度差;(E–G) H₂OCu-MOFHHTP  Zn (002) 面吸附能。
从原子层面阐明本征机制:
正极吸附催化:Cu-O₄位点对 I⁻/I₂/I₃⁻吸附能高达 - 1.5 eV,化学吸附强锁定;碘转化能垒大幅降低,双向催化加速;
负极界面稳定:Cu-MOF 在锌表面吸附能 - 5.61 eV,远强于 H₂O,优先吸附构筑保护层;
电子转移:碘吸附引发明显电荷重排,Cu-O₄为核心活性中心。
 5 作用机制示意图
提出的利用二维Cu- MOF 作为阴极和阳极多功能调节剂的工作机制,以协同提升AZIBs性能。
6高负载与软包电池实用化性能
6. (A) 高负载电池 1C 循环;(B) 倍率性能;(C) 10C 超长循环;(D,E) 原位 EIS(F,G) 原位 DRT 分析;(H) 软包电池循环与实物图;(I) 软包电池驱动计时器。
展示高负载与实用化突破:
高负载耐受:8.0 mg cm⁻² 高碘负载,1C 初始容量 233.4 mAh g⁻¹300 圈保持 160.5 mAh g⁻¹10C 循环 2500 圈容量 106.4 mAh g⁻¹
原位证实:高负载下电荷转移阻抗稳定无波动,多碘化物扩散与转化动力学显著提升;
软包验证:3×3 cm² 软包电池 1C 循环 500 圈容量 106.1 mAh g⁻¹,成功驱动电子计时器,实用潜力突出。
【结论总结】
本研究开发二维导电 Cu-MOF 双电极协同调控全新策略,利用 Cu-O₄配位中心的双功能特性,同时实现碘正极强吸附催化与锌负极均匀稳定沉积。Cu-MOF 彻底抑制多碘化物穿梭、加速碘转化动力学,同时引导无枝沉积、遏制析氢与腐蚀,完美解决高负载锌碘电池核心难题。高负载电池实现超长循环与高倍率,软包电池稳定运行,为高性能、高负载、实用化水系锌碘电池提供通用高效新范式。
【文献速递】
2D Conductive Cu‐MOF as a Multifunctional Regulator of Both Cathode and Anode to Synergistically Enhance the Performance of High‐Loading Aqueous Zinc‐Iodine Batteries. Advanced Functional Materials, 2026; https://doi.org/10.1002/adfm.75302
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  1. CONNECT:[ UseTime:0.000612s ] mysql:host=127.0.0.1;port=3306;dbname=i460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000924s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000341s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000268s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000597s ]
  6. SELECT * FROM `set` [ RunTime:0.000223s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000722s ]
  8. SELECT * FROM `article` WHERE `id` = 513832 LIMIT 1 [ RunTime:0.000513s ]
  9. UPDATE `article` SET `lasttime` = 1777348645 WHERE `id` = 513832 [ RunTime:0.004178s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.002598s ]
  11. SELECT * FROM `article` WHERE `id` < 513832 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000535s ]
  12. SELECT * FROM `article` WHERE `id` > 513832 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000471s ]
  13. SELECT * FROM `article` WHERE `id` < 513832 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003435s ]
  14. SELECT * FROM `article` WHERE `id` < 513832 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000956s ]
  15. SELECT * FROM `article` WHERE `id` < 513832 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000908s ]
0.087769s