Enhancing cycling stability of tungsten oxide supercapacitor electrodes via a boron cluster-based molecular cross-linking approach
Enhancing cycling stability of tungsten oxide supercapacitor electrodes via a boron cluster-based molecular cross-linking approach
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通过基于硼簇的分子交联方法增强氧化钨超级电容器电极的循环稳定性
DOI：
10.1039/d0ta05915c
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发表时间：
2020
影响因子：
11.9
通讯作者：
Spokoyny, Alexander M.
中科院分区：
文献类型：
--
作者：
Jung, Dahee;Muni, Mit;Marin, Gustavo;Ramachandran, Roshini;El-Kady, Maher F.;Balandin, Tanya;Kaner, Richard B.;Spokoyny, Alexander M.
我们报告了我们的发现，利用过羟基化的十二硼酸盐簇（[B12（OH）12]2-）作为分子交联剂，以产生混合氧化钨材料。[NnBu 4]2[B12（OH）12]与WCl 6的反应，随后在空气中在500 °C下对产物进行退火，成功地产生了与B12基簇交联的氧化钨材料。所产生的混合材料的全面结构研究证实了完整的富硼簇和氧化钨的交联网络。我们进一步证明了这些强大的B12为基础的集群在所得的混合氧化钨材料可以有效地保持高达4000个周期的比电容和减少电荷转移电阻以及响应时间相比，原始氧化钨。最终，这项工作突出了混合金属氧化物中富含硼的簇的有前途的能力，以获得快速和稳定的高电容超级电容器。
We report our discovery of utilizing perhydroxylated dodecaborate clusters ([B12(OH)12]2−) as a molecular cross-linker to generate a hybrid tungsten oxide material. The reaction of [NnBu4]2[B12(OH)12] with WCl6, followed by subsequent annealing of the product at 500 °C in air successfully produces a tungsten oxide material cross-linked with B12-based clusters. The comprehensive structural study of the produced hybrid material confirms a cross-linked network of intact boron-rich clusters and tungsten oxides. We further demonstrate how these robust B12-based clusters in the resulting hybrid tungsten oxide material can effectively preserve the specific capacitance up to 4000 cycles and reduce the charge transfer resistance as well as the response time compared to that of pristine tungsten oxide. Ultimately, this work highlights a promising capability of boron-rich clusters in hybrid metal oxides to obtain fast and stable supercapacitors with high capacitance.