Polydopamine‐derived carbon layer anchoring NiCo‐P nanowire arrays for high‐performance binder‐free supercapacitor and electrocatalytic hydrogen evolution
Zhenyuan Zhang,
Na Song,
Jian Wang,
Yingqi Liu,
Zhang Dai,
Guangdi Nie
Affiliations
Zhenyuan Zhang
Industrial Research Institute of Nonwovens & Technical Textiles (Shandong Center for Engineered Nonwovens) and Collaborative Innovation Center for Eco‐Textiles of Shandong Province College of Textiles and Clothing, Qingdao University Qingdao P. R. China
Na Song
Alan G. MacDiarmid Institute, College of Chemistry Jilin University Changchun P. R. China
Jian Wang
Industrial Research Institute of Nonwovens & Technical Textiles (Shandong Center for Engineered Nonwovens) and Collaborative Innovation Center for Eco‐Textiles of Shandong Province College of Textiles and Clothing, Qingdao University Qingdao P. R. China
Yingqi Liu
College of Textile and Clothing Xinjiang University Urumchi P. R. China
Zhang Dai
Industrial Research Institute of Nonwovens & Technical Textiles (Shandong Center for Engineered Nonwovens) and Collaborative Innovation Center for Eco‐Textiles of Shandong Province College of Textiles and Clothing, Qingdao University Qingdao P. R. China
Guangdi Nie
Industrial Research Institute of Nonwovens & Technical Textiles (Shandong Center for Engineered Nonwovens) and Collaborative Innovation Center for Eco‐Textiles of Shandong Province College of Textiles and Clothing, Qingdao University Qingdao P. R. China
Abstract Transition metal phosphides (TMPs) have been extensively and deeply researched as electrode materials for energy‐related applications. However, the inferior stability is still a bottleneck restricting their substantive development. Herein, a freestanding three‐dimensional hierarchical nanostructure (marked as CC@NC/NiCo‐P) is delicately designed for high‐performance supercapacitors and electrocatalytic hydrogen evolution, where the nitrogen‐doped carbon (NC) layer derived from polydopamine serves as an interface coupling bridge for anchoring electroactive nickel cobalt phosphide (NiCo‐P) nanowire arrays on flexible carbon cloth (CC) substrate. Thanks to the robust interaction between the conductive carbon support and NiCo‐P nanowires, the resultant CC@NC/NiCo‐P electrode delivers an ultrahigh capacitance (2175.5 F/g at 1 A/g) and a distinguished rate capability with a capacity retention of 85.8%. The assembled asymmetric supercapacitor can achieve a superior energy density of 28.47 Wh/kg and an ultralong lifespan of 10 000 cycles. In addition, the CC@NC/NiCo‐P electrode shows favorable electrocatalytic activity toward the hydrogen evolution reaction. These results indicate that the strong binding between the NC layer and metal species in TMPs notably improves the stability and electrochemical activity of CC@NC/NiCo‐P. It is expected that this effective strategy to design innovative electrode materials may be promising for the applications in energy‐related fields.
