Premium
3D Porous Tin Created by Tuning the Redox Potential Acts as an Advanced Electrode for Sodium‐Ion Batteries
Author(s) -
Wang Liubin,
Ni Youxuan,
Lei Kaixiang,
Dong Huanhuan,
Tian Sen,
Li Fujun
Publication year - 2018
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201801662
Subject(s) - electrochemistry , materials science , electrolyte , redox , tin , porosity , electrode , anode , chemical engineering , thiourea , energy storage , battery (electricity) , nanotechnology , inorganic chemistry , chemistry , metallurgy , composite material , power (physics) , physics , organic chemistry , quantum mechanics , engineering
Sodium‐ion batteries (SIBs) have attracted significant research interest for large‐scale electric energy storage. However, anodes with good rate capability and long cycle life are still lacking. Here, a three‐dimensional (3D) porous Sn on Cu foil (Sn/Cu) is prepared by tuning the redox potential of Cu + /Cu with a ligand of thiourea to trigger the replacement reaction between Cu and Sn 2+ . The as‐synthesized Sn/Cu is used as an integrated porous electrode and can be directly applied as an advanced freestanding electrode for SIBs. Such a unique structure can efficiently relieve the strain caused by sodiation/desodiation and benefit penetration of the electrolyte and diffusion of Na + . This is a merit of its large reversible capacity of about 700 mAh g −1 at 2500 mA g −1 for 400 cycles. A full battery of Sn/Cu//Na 3 (VO 0.5 ) 2 (PO 4 ) 3 F 2 is constructed, which presents a high energy density of 311.7 Wh kg −1 and long lifespan of 200 cycles. This facile synthesis strategy and good electrochemical performance will encourage more investigations into structure design of functional materials.