TY - JOUR
T1 - P2-Type Moisture-Stable and High-Voltage-Tolerable Cathodes for High-Energy and Long-Life Sodium-Ion Batteries
AU - Yuan, Siqi
AU - Yu, Lei
AU - Qian, Guannan
AU - Xie, Yingying
AU - Guo, Penghui
AU - Cui, Guijia
AU - Ma, Jun
AU - Ren, Xiangyu
AU - Xu, Zhixin
AU - Lee, Sang-Jun
AU - Lee, Jun-Sik
AU - Liu, Yijin
AU - Ren, Yang
AU - Li, Linsen
AU - Tan, Guoqiang
AU - Liao, Xiaozhen
PY - 2023/3/8
Y1 - 2023/3/8
N2 - P2-Na0.67Ni0.33Mn0.67O2 represents a promising cathode for Na-ion batteries, but it suffers from severe structural degradation upon storing in a humid atmosphere and cycling at a high cutoff voltage. Here we propose an in situ construction to achieve simultaneous material synthesis and Mg/Sn cosubstitution of Na0.67Ni0.33Mn0.67O2 via one-pot solid-state sintering. The materials exhibit superior structural reversibility and moisture insensitivity. In-operando XRD reveals an essential correlation between cycling stability and phase reversibility, whereas Mg substitution suppressed the P2-O2 phase transition by forming a new Z phase, and Mg/Sn cosubstitution enhanced the P2-Z transition reversibility benefiting from strong Sn-O bonds. DFT calculations disclosed high chemical tolerance to moisture, as the adsorption energy to H2O was lower than that of the pure Na0.67Ni0.33Mn0.67O2. A representative Na0.67Ni0.23Mg0.1Mn0.65Sn0.02O2 cathode exhibits high reversible capacities of 123 mAh g-1 (10 mA g-1), 110 mAh g-1 (200 mA g-1), and 100 mAh g-1 (500 mA g-1) and a high capacity retention of 80% (500 mA g-1, 500 cycles). © 2023 American Chemical Society
AB - P2-Na0.67Ni0.33Mn0.67O2 represents a promising cathode for Na-ion batteries, but it suffers from severe structural degradation upon storing in a humid atmosphere and cycling at a high cutoff voltage. Here we propose an in situ construction to achieve simultaneous material synthesis and Mg/Sn cosubstitution of Na0.67Ni0.33Mn0.67O2 via one-pot solid-state sintering. The materials exhibit superior structural reversibility and moisture insensitivity. In-operando XRD reveals an essential correlation between cycling stability and phase reversibility, whereas Mg substitution suppressed the P2-O2 phase transition by forming a new Z phase, and Mg/Sn cosubstitution enhanced the P2-Z transition reversibility benefiting from strong Sn-O bonds. DFT calculations disclosed high chemical tolerance to moisture, as the adsorption energy to H2O was lower than that of the pure Na0.67Ni0.33Mn0.67O2. A representative Na0.67Ni0.23Mg0.1Mn0.65Sn0.02O2 cathode exhibits high reversible capacities of 123 mAh g-1 (10 mA g-1), 110 mAh g-1 (200 mA g-1), and 100 mAh g-1 (500 mA g-1) and a high capacity retention of 80% (500 mA g-1, 500 cycles). © 2023 American Chemical Society
KW - cosubstitution
KW - P2-type cathode
KW - reversible phase transition
KW - sodium-ion batteries
KW - solid-state synthesis
UR - http://www.scopus.com/inward/record.url?scp=85148912905&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85148912905&origin=recordpage
U2 - 10.1021/acs.nanolett.2c04465
DO - 10.1021/acs.nanolett.2c04465
M3 - RGC 21 - Publication in refereed journal
SN - 1530-6984
VL - 23
SP - 1743
EP - 1751
JO - Nano Letters
JF - Nano Letters
IS - 5
ER -
