材料科学
超级电容器
复合数
多孔性
电容感应
电极
电容
电解质
储能
复合材料
极化(电化学)
化学工程
纳米技术
电气工程
化学
量子力学
物理
工程类
物理化学
功率(物理)
作者
Zhenghui Pan,Lixing Kang,Li Tan,Moaz Waqar,Jie Yang,Qilin Gu,Ximeng Liu,Zongkui Kou,Zhao Wang,Lirong Zheng,John Wang
出处
期刊:ACS Nano
[American Chemical Society]
日期:2021-08-09
卷期号:15 (8): 12975-12987
被引量:70
标识
DOI:10.1021/acsnano.1c01817
摘要
Electrolyte-accessibly porous yet densely packed MXene composite electrodes with high ion-accessible surface and rapid ion transport rate have shown exceptional promise for high-volumetric-performance supercapacitors (SCs), but they are largely limited by the insufficient rate capability and poor electrochemical cyclability, in association with the instability in mechanical robustness of the porous network structures. Taking advantage of chemical bonding design, herein a black phosphorus (BP)@MXene compact film of 3D porous network structure is successfully made by in situ growth of BP nanoparticles on crumbled MXene flakes. The strong interfacial interaction (Ti-O-P bonds) formed at the BP-MXene interfaces not only enhances the atomic charge polarization in the BP-MXene heterostructures, leading to efficient interfacial electron transport, but also stabilizes the 3D porous yet dense architecture with much improved mechanical robustness. Consequently, fully packaged SCs using the BP@MXene composite films with a practical-level of mass loading (∼15 mg cm-2) deliver a high stack volumetric energy density of 72.6 Wh L-1, approaching those of lead-acid batteries (50-90 Wh L-1), together with a long-term stability (90.58% capacitance retention after 50000 cycles). The achievement of such high energy density bridges the gap between traditional batteries and SCs and represents a timely breakthrough in designing compact electrodes toward commercial-level capacitive energy storage.
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