Details

Autor(en) / Beteiligte

• Qi, Ji-Qiu
• Huang, Meng-Yuan
• Ruan, Chen-Ya
• Zhu, Dong-Dong
• Zhu, Lei
• Wei, Fu-Xiang
• Sui, Yan-Wei
• Meng, Qing-Kun

Titel

Construction of CoNi2S4 nanocubes interlinked by few-layer Ti3C2Tx MXene with high performance for asymmetric supercapacitors

Ist Teil von

• Rare metals, 2022-12, Vol.41 (12), p.4116-4126

Ort / Verlag

Beijing: Nonferrous Metals Society of China

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Both MXene and zeolitic imidazolate framework (ZIF) derivatives are tend to agglomerate during the compound process, which adversely affects their electrochemical properties. To alleviate this phenomenon, few-layer MXene was stripped by mechanical method, and electrostatic self-assembly with ZIF-67 in the presence of cationic surfactants. Furthermore, CoNi 2 S 4 /MXene composite was synthesized by the facile hydrothermal reaction. CoNi 2 S 4 well retained the cube frame structure of the ZIF-67 with the sagging outer frame and rough surface. In the composite, CoNi 2 S 4 nanocubes were interlinked by MXene nanosheets, which can effectively improve the structural stability and make full use of the active surface. CoNi 2 S 4 /MXene composite electrode exhibits an outperforming specific capacitance (751 C·g −1 at 1 A·g −1 ), far higher than that of pure CoNi 2 S 4 (600 C·g −1 at 1 A·g −1 ). An asymmetric supercapacitor (CoNi 2 S 4 /MXene//reduced graphene oxide (RGO)) assembling delivers high energy density of 33.8 Wh·kg −1 and excellent cycling performance. This study indicates the potential of MXene/ZIF derivatives in the application of supercapacitor. Graphical abstract