TY - JOUR
T1 - Tuning the rate performance in O2-type layered manganese-based oxides through cobalt doping
AU - Li, Junda
AU - Yang, Xiaoxia
AU - Yan, Guanjie
AU - Zhang, Jilu
AU - Wang, Qin
AU - Li, Chunliu
AU - Liu, Laijun
AU - Hua, Weibo
N1 - Publisher Copyright:
© 2025 The Royal Society of Chemistry.
PY - 2025/9/9
Y1 - 2025/9/9
N2 - Lithium-rich manganese-based cathode materials Li[LixNiyMn1−x−y]O2 have received considerable attention. However, severe voltage decay and structural distortion of O3-type layered oxides hinder further practical applications. O2-type layered cathode materials can restrict the movements of transition metals and effectively suppress the voltage decay. However, O2-type layered oxides are fundamentally limited by inferior rate performance. Herein, we introduce cobalt into the TM layer in the O2-type oxide, Li0.80[Ni0.25Mn0.66Co0.02□0.07]O2 (□ represents vacancy, O2-LNMCO), which increases the electronic and ionic conductivity, improving the Li+ diffusion kinetics. Significantly, O2-LNMCO exhibits excellent rate properties, delivering a discharge specific capacity of 145 mAh g−1 at 5 C and 111.6 mAh g−1 at 10 C. Furthermore, the voltage decay of O2-LNMCO was restrained with an attenuation rate of 2.23 mV per cycle.
AB - Lithium-rich manganese-based cathode materials Li[LixNiyMn1−x−y]O2 have received considerable attention. However, severe voltage decay and structural distortion of O3-type layered oxides hinder further practical applications. O2-type layered cathode materials can restrict the movements of transition metals and effectively suppress the voltage decay. However, O2-type layered oxides are fundamentally limited by inferior rate performance. Herein, we introduce cobalt into the TM layer in the O2-type oxide, Li0.80[Ni0.25Mn0.66Co0.02□0.07]O2 (□ represents vacancy, O2-LNMCO), which increases the electronic and ionic conductivity, improving the Li+ diffusion kinetics. Significantly, O2-LNMCO exhibits excellent rate properties, delivering a discharge specific capacity of 145 mAh g−1 at 5 C and 111.6 mAh g−1 at 10 C. Furthermore, the voltage decay of O2-LNMCO was restrained with an attenuation rate of 2.23 mV per cycle.
UR - https://www.scopus.com/pages/publications/105015660370
U2 - 10.1039/d5cc03661e
DO - 10.1039/d5cc03661e
M3 - 文章
C2 - 40813269
AN - SCOPUS:105015660370
SN - 1359-7345
VL - 61
SP - 13916
EP - 13919
JO - Chemical Communications
JF - Chemical Communications
IS - 73
ER -