Premium
A Sodiophilic Interphase‐Mediated, Dendrite‐Free Anode with Ultrahigh Specific Capacity for Sodium‐Metal Batteries
Author(s) -
Ye Lei,
Liao Meng,
Zhao Tiancheng,
Sun Hao,
Zhao Yang,
Sun Xuemei,
Wang Bingjie,
Peng Huisheng
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201910202
Subject(s) - nucleation , anode , dendrite (mathematics) , stripping (fiber) , interphase , sodium , materials science , chemical engineering , nanotechnology , chemistry , electrode , metallurgy , composite material , organic chemistry , geometry , mathematics , biology , engineering , genetics
Despite efforts to stabilize sodium metal anodes and prevent dendrite formation, achieving long cycle life with high areal capacities remains difficult owing to a combination of complex failure modes that involve retardant uneven sodium nucleation and subsequent dendrite formation. Now, a sodiophilic interphase based on oxygen‐functionalized carbon nanotube networks is presented, which concurrently facilitates a homogeneous sodium nucleation and a dendrite‐free, lateral growth behavior upon recurring sodium plating/stripping processes. This sodiophilic interphase renders sodium anodes with an ultrahigh capacity of 1078 mAh g −1 (areal capacity of 10 mAh cm −2 ), approaching the theoretical capacity of 1166 mAh g −1 of pure sodium, as well as a long cycle life up to 3000 cycles. Implementation of this anode allows for the construction of a sodium–air battery with largely enhanced cycling performance owing to the oxygen functionalization‐mediated, dendrite‐free sodium morphology.