当前位置:首页>南昌>『碘基文献速览』南昌航空大学研究团队&湖南大学梁宵教授‌JES:一步活化制备N/O共掺杂碳实现锌-碘电池中碘的限域-转化协同调控

『碘基文献速览』南昌航空大学研究团队&湖南大学梁宵教授‌JES:一步活化制备N/O共掺杂碳实现锌-碘电池中碘的限域-转化协同调控

  • 2026-03-23 20:22:04
『碘基文献速览』南昌航空大学研究团队&湖南大学梁宵教授‌JES:一步活化制备N/O共掺杂碳实现锌-碘电池中碘的限域-转化协同调控

第一作者:Jianting Yu 

通讯作者:Cailing LiuHongbo Huang、梁宵

通讯单位:南昌航空大学、湖南大学

DOI10.1016/j.est.2026.121202

【核心内容】

     水系锌碘(Zn–I)电池因其本征安全性高、资源丰富、环境友好及理论能量密度可观等优势,在面向碳中和目标的大规模可持续储能系统中具有重要战略价值。然而,其实际应用仍受限于两大关键科学问题:一是多碘化物(I₃⁻/I₅⁻)在正负极间的不可逆迁移所引发的穿梭效应,导致活性碘损失与库仑效率持续衰减;二是碘正极固有的低电子/离子电导率及缓慢的I/I氧化还原动力学,制约倍率性能与循环寿命。为协同解决上述瓶颈,南昌航空大学Cailing LiuHongbo Huang团队&湖南大学梁宵教授以苯并咪唑为双功能前驱体(兼具氮源与碳骨架构建能力),通过高效、可控的一锅式KOH活化工艺,成功制备出系列氮氧共掺杂分级多孔碳材料(KNOC-xx = 1, 2, 3)。其中,优化样品KNOC-2展现出2486 m² g¹的超高比表面积、以微孔为主(微孔率78.5%)且贯通性良好的分级孔结构,以及高达9.3 at.%的总杂原子掺杂量(N:O ≈ 2.1:1)。该结构不仅通过微孔物理限域与表面含氧/氮官能团化学锚定双重机制高效捕获碘物种,更借助N/O协同电子调制效应显著降低I/I反应能垒,从而同步实现碘的限域-转化协同调控。电化学测试表明,基于KNOC-2/I正极的Zn–I电池在2 A g¹高电流密度下稳定运行10000次后,仍保持144.2 mAh g¹的放电比容量,对应每循环容量衰减率仅为0.00269%,远优于同类报道;在0.5 A g¹下,初始放电比容量达198.6 mAh g¹,能量效率维持在82.4%以上。本工作不仅确立了一种原料易得、工艺简洁、可放大的杂原子共掺杂碳材料制备范式,更从前驱体分子设计活化过程调控孔道/掺杂协同构效关系电化学响应全链条角度,为发展兼具高利用率、快反应动力学与超长循环稳定性的锌-碘电池正极材料提供了系统性解决方案其相关成果以题为One-step activation towards N/O-co-doped carbon for iodine confinement-conversion in Zn-I2 batteries在国际知名期刊《Journal of Energy Storage》上发表。

【图文简介】

1. KOH活化制备氮氧共掺杂分级多孔碳及其碘限域机制

2. 合成条件对碳材料表面化学性质的影响

3. KNOC-x材料的结构缺陷、表面化学及碘负载性能表征

4. Zn-I2电池的电化学性能测试

5. Zn-I2电池动力学分析

6. 软包电池器件级验证与实际应用潜力

【结论】

     综上所述,本研究以苯并咪唑(BZI)为单一碳源与杂原子前驱体,采用简便、可控的一锅式KOH活化法成功构建了氮氧共掺杂分级多孔碳材料(KNOC-2),并将其确立为高性能碘正极载体。通过系统调控KOH/BZI质量比及碳化温度,实现了对材料比表面积、孔径分布(微孔/介孔协同构型)及N/O杂原子种类与含量的精准调控,从而在物理限域与化学锚定两个维度协同强化碘物种的捕获能力,并显著提升多碘化物转化反应动力学。优化所得KNOC-2兼具高比表面积(>1500 m² g¹)与均衡的微/介孔分级结构,不仅提供了丰富的吸附位点,更保障了电解质浸润性与离子传输通路,因而展现出优异的多碘化物吸附容量与快速界面反应动力学。电化学性能验证表明:I@KNOC-2//Zn扣式电池在2 A g¹高倍率下稳定循环10,000圈后,仍可输出144.2 mAh g¹的可逆比容量,平均库仑效率高达99.8%;所组装的实用化软包电池在0.5 A g¹下循环600次后,放电比容量维持在168.9 mAh g¹,容量保持率达86.8%深入的机理研究表明,其高性能源于双重协同机制:一方面,高度发达的微孔网络提供强效物理限域,抑制多碘化物扩散;另一方面,吡啶氮(N-6)、吡咯氮(N-5)及羰基氧(C=O)等活性位点通过卤键(IN/O)与多碘化物形成稳定化学相互作用,实现高效化学锚定。二者协同作用显著抑制了穿梭效应;同时,分级孔道结构与杂原子位点的本征催化活性共同促进了I/I₃⁻/I₅⁻等多碘化物之间的快速可逆转化。本工作提出了一种兼具普适性与可扩展性的材料设计范式——通过同步优化碳基质的孔结构与表面化学,协同调控吸附行为与电化学反应动力学,为高性能水系锌-碘电池的理性开发与工程化应用提供了切实可行的技术路径。

【文献信息】

J. Yu, C. Liu, H. Huang, Z. Yu, S. Luo, M. Xie, D. Ma, F. Zeng, P. Xiong, X. Liang, One-step activation towards N/O-co-doped carbon for iodine confinement-conversion in Zn-I2 batteries.

Journal of Energy Storage 2026, 154: 121202

https://doi.org/10.1016/j.est.2026.121202

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  1. CONNECT:[ UseTime:0.000898s ] mysql:host=127.0.0.1;port=3306;dbname=aa460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000775s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000321s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000261s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000552s ]
  6. SELECT * FROM `set` [ RunTime:0.000197s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000544s ]
  8. SELECT * FROM `article` WHERE `id` = 481839 LIMIT 1 [ RunTime:0.000433s ]
  9. UPDATE `article` SET `lasttime` = 1775883545 WHERE `id` = 481839 [ RunTime:0.007087s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000323s ]
  11. SELECT * FROM `article` WHERE `id` < 481839 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000675s ]
  12. SELECT * FROM `article` WHERE `id` > 481839 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000406s ]
  13. SELECT * FROM `article` WHERE `id` < 481839 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000980s ]
  14. SELECT * FROM `article` WHERE `id` < 481839 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000897s ]
  15. SELECT * FROM `article` WHERE `id` < 481839 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001532s ]
0.118286s