TY - JOUR
T1 - Tracing the Impact of Hybrid Functional Additives on a High-Voltage (5 V-class) SiOx-C/LiNi0.5Mn1.5O4 Li-Ion Battery System
AU - Xu, Gaojie
AU - Wang, Xiao
AU - Li, Jiedong
AU - Shangguan, Xuehui
AU - Huang, Suqi
AU - Lu, Di
AU - Chen, Bingbing
AU - Ma, Jun
AU - Dong, Shanmu
AU - Zhou, Xinhong
AU - Kong, Qingyu
AU - Cui, Guanglei
N1 - Publisher Copyright:
Copyright © 2018 American Chemical Society.
PY - 2018/11/27
Y1 - 2018/11/27
N2 - The development of next generation high energy density lithium ion batteries (LIBs) adopting electrode materials with higher specific capacity or higher working voltage has attracted great interest. In this paper, fluoroethylene carbonate (FEC) and 1,3-propanediolcyclic sulfate (PCS) are unprecedentedly combined as hybrid functional additives to significantly improve the performances of a very challenging next-generation high voltage (5 V-class) SiOx-C/LiNi0.5Mn1.5O4 battery system, where SiOx-C composite shows a high specific capacity of 450 mAh g-1 and LiNi0.5Mn1.5O4 has a high working voltage plateau (∼4.7 V vs Li+/Li). Combining in situ differential electrochemical mass spectrometry (DEMS) technology, theoretical calculations, and conventional ex situ characterizations, it is revealed that small amounts of lithium-containing species (such as LiF, sulfate species, and organic sulfite species) with excellent electronic-insulating, ionic-conducting, and compact properties are derived from prior decomposition of additives and incorporated into the solid electrolyte interface (SEI) layer of SiOx-C electrode, suppressing the reductive decomposition of carbonate solvents as well as the gas generation (C2H4, CO2, and H2). Moreover, hybrid functional additives are beneficial for forming a compact and homogeneous cathode SEI layer, alleviating dissolution of transition metals, structure degradation, and loss of active lithium. This manuscript provides a very useful research method for understanding the working mechanism of functional additives and will also help us to depict the SEI layer formation mechanism more accurately.
AB - The development of next generation high energy density lithium ion batteries (LIBs) adopting electrode materials with higher specific capacity or higher working voltage has attracted great interest. In this paper, fluoroethylene carbonate (FEC) and 1,3-propanediolcyclic sulfate (PCS) are unprecedentedly combined as hybrid functional additives to significantly improve the performances of a very challenging next-generation high voltage (5 V-class) SiOx-C/LiNi0.5Mn1.5O4 battery system, where SiOx-C composite shows a high specific capacity of 450 mAh g-1 and LiNi0.5Mn1.5O4 has a high working voltage plateau (∼4.7 V vs Li+/Li). Combining in situ differential electrochemical mass spectrometry (DEMS) technology, theoretical calculations, and conventional ex situ characterizations, it is revealed that small amounts of lithium-containing species (such as LiF, sulfate species, and organic sulfite species) with excellent electronic-insulating, ionic-conducting, and compact properties are derived from prior decomposition of additives and incorporated into the solid electrolyte interface (SEI) layer of SiOx-C electrode, suppressing the reductive decomposition of carbonate solvents as well as the gas generation (C2H4, CO2, and H2). Moreover, hybrid functional additives are beneficial for forming a compact and homogeneous cathode SEI layer, alleviating dissolution of transition metals, structure degradation, and loss of active lithium. This manuscript provides a very useful research method for understanding the working mechanism of functional additives and will also help us to depict the SEI layer formation mechanism more accurately.
UR - http://www.scopus.com/inward/record.url?scp=85056457527&partnerID=8YFLogxK
U2 - 10.1021/acs.chemmater.8b03764
DO - 10.1021/acs.chemmater.8b03764
M3 - 文章
AN - SCOPUS:85056457527
SN - 0897-4756
VL - 30
SP - 8291
EP - 8302
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 22
ER -