Optimizing performance: Achieving high capacitance and cycling durability in alkaline electrolyte with SnO2/SnSe||AC/KOH-based aqueous hybrid supercapacitor

作者：Shah, Muhammad Zia Ullah; Shah, Jamal; Hayat, Khizar; Shah, S. K.; Hussain, Iftikhar; Khan, Afaq Ullah; Shah, Muhammad Sanaullah; Hou, Hongying^*; Sajjad, Muhammad^*; Al-Saeedi, Sameerah I.; Shah, A.^*

来源：Journal of Energy Storage, 2024, 75: 109662.

DOI：10.1016/j.est.2023.109662

• Aqueous hybrid asymmetric supercapacitor
• SnSe
• SnO2-SnSe nanocomposite
• Cycling stability
• Wet-chemical synthesis

A facile wet-chemical assisted synthesis route is adapted to prepare a novel SnO2/SnSe nanocomposite for the time to construct an aqueous asymmetric hybrid supercapacitor (AAHSC). The detailed characterization reveals the appropriate formation of micro flower-like SnO2-SnSe nanocomposite-covered with SnSe network to provide a conductive support and facilitate charge transport during the electrochemical processs. Compared with pure SnO2 micro flowers and SnSe electrodes, the SnO2-SnSe nanocomposite electrode delivers a brilliant charge storage performance. A rapid charge transport pathways was accomplished due to the lowest charge transfer resistance, resulting in a high capacitance and improved charge storage properties in an aqueous alkaline electrolyte solution with incredible reversibility and rate capability. Inspired by the excellent charge storage and capacitive properties, a two-cell mode-based AAHSC was built with SnO2-SnSe nanocomposite (cathode) and activated carbon (AC) as an anode (symbolized as SnO2-SnSe||AC/KOH) displayed the highest energy of 33.4 Wh/kg at a maximum power of 4003.7 W/kg, operating in a voltage of 1.6 V with excellent cycling stability of 89.5 %.

• 单位
  江苏大学; 浙江师范大学