TY - JOUR
T1 - Alleviating structural degradation of nickel-rich cathode material by eliminating the surface Fm3¯m phase
AU - Wu, Feng
AU - Tian, Jun
AU - Liu, Na
AU - Lu, Yun
AU - Su, Yuefeng
AU - Wang, Jing
AU - Chen, Renjie
AU - Ma, Xu
AU - Bao, Liying
AU - Chen, Shi
N1 - Publisher Copyright:
© 2017
PY - 2017/7
Y1 - 2017/7
N2 - Nickel-rich LiNixM1-xO2 (M=Co, Mn or Al, x>0.6) oxide owns high capacity and energy density as cathode material for Li-ion batteries. However, the severe structural decay during cycling impedes its commercialization. In our work, the rock-salt Fm 3¯ m phase on the LiNi0.8Co0.1Mn0.1O2 particle surface which can induce the structural instability during cycling is inhibited to produce: LiNi0.71Co0.09Mn0.2O2 cathode material composes of a uniform layered R3¯m phase with a self-assembled concentration-gradient shell is prepared using Mn precursor coating on Ni0.8Co0.1Mn0.1(OH)2. This material shows enhanced structural stability due to the removal of Fm 3¯ m phase, contributing to capacity retention of 92.2% after 100 cycles at 0.1 C rate between 2.8 and 4.5 V. In addition, the thermal stability is also improved after the elimination of Fm3¯m phase.
AB - Nickel-rich LiNixM1-xO2 (M=Co, Mn or Al, x>0.6) oxide owns high capacity and energy density as cathode material for Li-ion batteries. However, the severe structural decay during cycling impedes its commercialization. In our work, the rock-salt Fm 3¯ m phase on the LiNi0.8Co0.1Mn0.1O2 particle surface which can induce the structural instability during cycling is inhibited to produce: LiNi0.71Co0.09Mn0.2O2 cathode material composes of a uniform layered R3¯m phase with a self-assembled concentration-gradient shell is prepared using Mn precursor coating on Ni0.8Co0.1Mn0.1(OH)2. This material shows enhanced structural stability due to the removal of Fm 3¯ m phase, contributing to capacity retention of 92.2% after 100 cycles at 0.1 C rate between 2.8 and 4.5 V. In addition, the thermal stability is also improved after the elimination of Fm3¯m phase.
KW - Lithium-ion batteries
KW - Nickel-rich cathode
KW - Self-assembled shell
KW - Structural stability
KW - Surface structure
UR - http://www.scopus.com/inward/record.url?scp=85019646629&partnerID=8YFLogxK
U2 - 10.1016/j.ensm.2017.05.008
DO - 10.1016/j.ensm.2017.05.008
M3 - Article
AN - SCOPUS:85019646629
SN - 2405-8297
VL - 8
SP - 134
EP - 140
JO - Energy Storage Materials
JF - Energy Storage Materials
ER -
