高性能混合超级电容器和电池型电极材料的可扩展策略,Advanced Engineering Materials

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高性能混合超级电容器和电池型电极材料的可扩展策略
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2023-08-22 , DOI: 10.1002/adem.202300725
Guangdong Qian ₁ , Yao Qi ₁ , Meng Zhang ₁ , Han Lv ₁ , Xinbo Li ₁ , Rui Liu ₁ , Huiling Zhu ₁

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越来越多的领域迫切需要紧凑、轻便、功能强大的储能装置。层状双氢氧化物（LDH）作为混合超级电容器和电池型电极材料在储能装置中发挥着重要作用。本文展示了一种通过使用或不使用分散剂的简单球磨来大规模生产电极材料的方法，并证明了三元氢氧化物前体的性能和粒径之间的关系。添加分散剂后，二次粒子被有效破碎，在此基础上发现，防止一次粒子团聚成二次粒子是提高材料比电容的关键。此外，还研究了不同研磨球对含有分散剂的NCM811-OH的形貌和电化学性能的影响。当添加分散剂并使用NCM-OH-S进行球磨时，可以更有效地破碎二次颗粒。在不同Ni含量的对比实验中，Ni _1/3 Co _1/3 Mn _1/3 (OH) ₂显示出最好的电化学性能（1 A g -1 时为^{1,417 F g}^-1），表明该材料具有适度的电化学性能。 Ni含量具有优化的电化学性能。这些发现为大规模生产高性能LDH电极材料提供了新途径。

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Scalable Strategy for High-Performance Hybrid Supercapacitor and Battery-Type Electrode Materials

Compact, lightweight, and powerful energy storage devices are urgently needed in more and more fields. Layered double hydroxides (LDH) as hybrid supercapacitors and battery-type electrode materials play an important role in energy storage devices. Herein, a method for large-scale production of electrode materials via simple ball milling with or without dispersant is shown and demonstrates the relationship between performance and particle size of the ternary hydroxide precursor. When the dispersant is added, the secondary particles are effectively broken, on the basis of which it is found that preventing the primary particles from agglomerating into secondary particles is the key to improving the specific capacitance of the material. In addition, the effect of different milling balls on the morphology and electrochemical properties of NCM811-OH with dispersants is investigated. When dispersant is added and NCM-OH-S is used for ball milling, the secondary particles can be more effectively broken. In the comparative experiments with different Ni contents, Ni_1/3Co_1/3Mn_1/3(OH)₂ shows the best electrochemical performance (1,417 F g⁻¹ at 1 A g⁻¹), indicating that the material with moderate Ni content has the optimized electrochemical performance. These findings provide a new avenue for large-scale production of high-performance LDH electrode materials.

更新日期：2023-08-22

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