Filters

2020 - 20212

More filters

2020 - 20222
Reset filters

Settings

Author: Bandari, Vineeth Kumar × Author: Wang, Jinhui × Author: Zhu, Feng × End date: 2024 × Start date: 2020 × Has files: Yes × Type: Text ×

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Stamping Fabrication of Flexible Planar Micro‐Supercapacitors Using Porous Graphene Inks
    (Hoboken : Wiley, 2020) Li, Fei; Qu, Jiang; Li, Yang; Wang, Jinhui; Zhu, Minshen; Liu, Lixiang; Ge, Jin; Duan, Shengkai; Li, Tianming; Bandari, Vineeth Kumar; Huang, Ming; Zhu, Feng; Schmidt, Oliver G.
    High performance, flexibility, safety, and robust integration for micro‐supercapacitors (MSCs) are of immense interest for the urgent demand for miniaturized, smart energy‐storage devices. However, repetitive photolithography processes in the fabrication of on‐chip electronic components including various photoresists, masks, and toxic etchants are often not well‐suited for industrial production. Here, a cost‐effective stamping strategy is developed for scalable and rapid preparation of graphene‐based planar MSCs. Combining stamps with desired shapes and highly conductive graphene inks, flexible MSCs with controlled structures are prepared on arbitrary substrates without any metal current collectors, additives, and polymer binders. The interdigitated MSC exhibits high areal capacitance up to 21.7 mF cm−2 at a current of 0.5 mA and a high power density of 6 mW cm−2 at an energy density of 5 µWh cm−2. Moreover, the MSCs show outstanding cycling performance and remarkable flexibility over 10 000 charge–discharge cycles and 300 bending cycles. In addition, the capacitance and output voltage of the MSCs are easily adjustable through interconnection with well‐defined arrangements. The efficient, rapid manufacturing of the graphene‐based interdigital MSCs with outstanding flexibility, shape diversity, and high areal capacitance shows great potential in wearable and portable electronics.
  • Thumbnail Image
    Item
    Recent developments of stamped planar micro-supercapacitors: Materials, fabrication and perspectives
    (Amsterdam : Elsevier, 2021) Li, Fei; Li, Yang; Qu, Jiang; Wang, Jinhui; Bandari, Vineeth Kumar; Zhu, Feng; Schmidt, Oliver G.
    The rapid development of wearable and portable electronics has dramatically increased the application for miniaturized energy storage components. Stamping micro-supercapacitors (MSCs) with planar interdigital configurations are considered as a promising candidate to meet the requirements. In this review, recent progress of the different stamping materials and various stamping technologies are first discussed. The merits of each material, manufacturing process of each stamping method and the properties of stamping MSCs are scrutinized, respectively. Further insights on technical difficulties and scientific challenges are finally demonstrated, including the limited thickness of printed electrodes, poor overlay accuracy and printing resolution.