| Co掺杂Ni(OH)2的超级电容器性能及其第一性原理计算研究 |
| Supercapacitor performance and first-principles calculation study of Co-doping Ni(OH)2 |
|
| 摘要: 用简单的共沉淀法制备了Co掺杂的Ni (OH)2，通过Co/Ni的协同作用改善了材料的电化学性能。Co原子掺杂改善了材料形貌，暴露了更多的缺陷位，提高了材料的电化学活性。同时第一性原理计算表明，Co掺杂也改变了Ni的电子云分布，提高了材料的电荷传输和离子扩散性能。得益于适宜的Co掺杂量，Ni0.84Co0.16(OH)2在1 A·g-1的电流密度下质量比容量高达1 589.6 F·g-1，同时组装后的非对称超级电容器在功率密度为21.33 kW·kg-1时仍具有8.30 Wh·kg-1的能量密度，显示出了良好的储能性能和循环性能。 |
| 关键词: 超级电容器 氢氧化镍 钴掺杂 |
| 基金项目: 太原科技大学科研启动基金(No.20242018)和山西省高等学校科技创新计划项目(No.2022L327)资助。 |
| Abstract: Co-doped Ni(OH)2 was prepared by a simple co-precipitation method, and the electrochemical performance was improved by the Co/Ni synergistic effect. Co-doping refined the grain size of Ni(OH)2, improved the morphology of the material, exposed more active sites, and improved the electrochemical activity of the material. Meanwhile, the first-principle calculation showed that Co-doping also changed the electron density distribution of Ni, leading to the improvement of the charge transport and ion diffusion properties of the material. Due to the appropriate quantity of Co doping, Ni0.84Co0.16(OH)2 had excellent electrochemical energy storage of 1 589.6 F·g-1 at the current density of 1 A·g-1, far higher than that of Ni(OH)2 (1 191.7 F·g-1). Meanwhile, the assembled asymmetric super-capacitor had an energy density of 8.30 Wh·kg-1 when the power density was 21.33 kW·kg-1, showing a good energy storage performance and cycle performance. |
| Keywords: supercapacitor nickel hydroxide Co-doping |
| 投稿时间：2024-04-03 修订日期：2024-07-24 |
| 摘要点击次数: 1162 |
| 全文下载次数: 1199 |
| 常进.Co掺杂Ni(OH)2的超级电容器性能及其第一性原理计算研究[J].无机化学学报,2024,40(9):1697-1707. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
