Anisotropic Boron-Carbon Hetero-Nanosheets for Ultrahigh Energy Density Supercapacitors.,Angewandte Chemie International Edition

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Anisotropic Boron-Carbon Hetero-Nanosheets for Ultrahigh Energy Density Supercapacitors.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-09-18 , DOI: 10.1002/anie.202011523
Tianyu Wu ₁ , Xingjiang Wu ₁ , Lianhui Li ₂ , Mingming Hao ₂ , Guan Wu ₁ , Ting Zhang ₂ , Su Chen ₁

Affiliation

A 2D boron nanosheet that exhibits high theoretical capacitance, around four times that of graphene, is a significant supercapacitor electrode. However, its bulk structure with low interlaminar conduction and porosity restricts the charge transfer, ion diffusion, and energy density. Herein, we develop a new 2D hetero‐nanosheet made of anisotropic boron–carbon nanosheets (ABCNs) by B−C chemical bonds via gas‐phase exfoliation and condensation bottom‐up strategy. The ABCNs are constructed into high flexible supercapacitor electrode by microfluidic electrospinning. The ABCN electrode greatly promotes smooth migration and excessive storage of electrolyte ions due to large interlayer conductivity, ionic pathways, and accessible surfaces. The flexible supercapacitor delivers ultrahigh volumetric energy density of 167.05 mWh cm⁻³ and capacitance of 534.5 F cm⁻³. A wearable energy‐sensor system is designed to stably monitor physiological signals.

中文翻译：

用于超高能量密度超级电容器的各向异性硼碳杂纳米片。

二维硼纳米片具有很高的理论电容，约为石墨烯的四倍，是一种重要的超级电容器电极。但是，其层间导电性和孔隙率低的整体结构限制了电荷转移，离子扩散和能量密度。在这里，我们通过气相剥离和冷凝自下而上的策略，通过BC化学键，开发了一种由各向异性硼碳纳米片（ABCN）制成的新型二维异纳米片。通过微流电纺丝将ABCNs制成高柔性超级电容器电极。由于具有较大的层间电导率，离子通道和可及的表面，ABCN电极极大地促进了电解质离子的平稳迁移和过度存储。柔性超级电容器可提供167.05 mWh cm ^-3的超高体积能密度和电容为534.5 F cm ^-3。可穿戴式能量传感器系统旨在稳定地监测生理信号。

更新日期：2020-09-18

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