Close‐packed storage of potassium metallic clusters achieved through nanostructure engineering of ultrafine hollow nanoparticles‐based carbon nanoclusters. Issue 3 (2nd May 2021)

• Record Type: Journal Article
• Authors: Liu, Bingqiu; Zhang, Qi; Li, Lu; Zhang, Lingyu; Jin, Zhanshuang; Wang, Chungang; Su, Zhongmin
• Is Part Of: EcoMat. Volume 3:Issue 3(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-05-02
• Subjects: close‐packed storage -- high rate -- K metallic clusters -- potassium‐ion half/full batteries -- ultrafine hollow carbon nanoclusters; Materials -- Environmental aspects -- Periodicals; Clean energy -- Periodicals; 621.042
• DOI: 10.1002/eom2.12105
• Languages: English
• ISSNs: 2567-3173

Abstract

Abstract: Ultrafine hollow nanoparticles‐based (7 nm) carbon nanoclusters (HNPCNCs) are developed by a facile and novel method. Benefiting from the ultrafine nanostructure, we have achieved close‐packed storage of K metallic clusters and a close‐packed K metallic clusters with a diameter of 7 nm has been observed for the first time through ex TEM. In K‐ion batteries, HNPCNCs anodes deliver an ultrahigh capacity of 269.8 mA h g −1 at 0.5 A g −1 after 200 cycles, outstanding rate performance of 150.5 mA h g −1 after 5000 cycles at 5 A g −1 . Moreover, an excellent electrochemical performance has been obtained by HNPCNCs//potassium Prussian blue potassium‐ion full cells, highlighting the practicability of HNPCNCs. The unprecedented electrochemical performance is attributed to the close‐packed K metallic clusters achieved by unique ultrafine hollow nanoparticles in the carbon nanoclusters. Abstract : A close‐packed storage of K metallic clusters has been achieved through a unique nanostructure of ultrafine hollow nanoparticle‐based (7 nm) carbon nanoclusters (HNPCNCs). The HNPCNCs are developed by a novel and facile method on a large scale and exhibit unprecedented electrochemical performance for PIBs.