TY - JOUR
T1 - Chemical disorder engineering enables high-voltage stable oxide cathodes over –20–25 ℃ in sodium-ion batteries
AU - Song, Tianyi
AU - Wang, Chenchen
AU - Kidkhunthod, Pinit
AU - Zhou, Xiaolong
AU - Zhu, Anquan
AU - Lan, Yuanqi
AU - Liu, Kunlun
AU - Liang, Jianli
AU - Zhang, Wenjun
AU - Yao, Wenjiao
AU - Tang, Yongbing
AU - Lee, Chun-Sing
PY - 2025/3
Y1 - 2025/3
N2 - O3-type Mn-Fe-Ni layer oxide cathodes show great commercialization potential due to their high capacities and simple synthesis. Nevertheless, simultaneously achieving high energy density and good cycling stability remains challenging. Herein, we introduce a chemical disordering strategy to create O3-Na0.83Mn0.35Fe0.15Ni0.15Cu0.10Co0.20Sn0.05O2 (MFNCCS) cathode. The chemical disordering strategy was implemented through selective multi-transition metal substitution and quenching during synthesis. The former promotes a high entropy effect, while the latter is beneficial to increasing the quenching disorder degree, functioning a synergy effect in suppressing irreversible multi-phase transitions and promoting cycling stability. As a result, the MFNCCS cathode can retain 91.6 % (∼103.3 mAh g–1) of its capacity after 500 cycles at 200 mA g–1, with an energy density of 285.3 Wh kg⁻1 at the 500th cycle, which is superior to previously reported state-of-the-art layered oxide cathodes in the voltage range of 2.0–4.3 V. Besides, it achieves stable cycling within 2.0–4.3 V over temperature range of –20 to 25 °C. This work offers new insights for high-voltage stable layered cathodes in wide-temperature SIBs. © 2025 Elsevier B.V.
AB - O3-type Mn-Fe-Ni layer oxide cathodes show great commercialization potential due to their high capacities and simple synthesis. Nevertheless, simultaneously achieving high energy density and good cycling stability remains challenging. Herein, we introduce a chemical disordering strategy to create O3-Na0.83Mn0.35Fe0.15Ni0.15Cu0.10Co0.20Sn0.05O2 (MFNCCS) cathode. The chemical disordering strategy was implemented through selective multi-transition metal substitution and quenching during synthesis. The former promotes a high entropy effect, while the latter is beneficial to increasing the quenching disorder degree, functioning a synergy effect in suppressing irreversible multi-phase transitions and promoting cycling stability. As a result, the MFNCCS cathode can retain 91.6 % (∼103.3 mAh g–1) of its capacity after 500 cycles at 200 mA g–1, with an energy density of 285.3 Wh kg⁻1 at the 500th cycle, which is superior to previously reported state-of-the-art layered oxide cathodes in the voltage range of 2.0–4.3 V. Besides, it achieves stable cycling within 2.0–4.3 V over temperature range of –20 to 25 °C. This work offers new insights for high-voltage stable layered cathodes in wide-temperature SIBs. © 2025 Elsevier B.V.
KW - Chemical disordering
KW - High-voltage stability
KW - Sodium-ion batteries
KW - Transition metal oxide cathode
KW - −20–25 °C
UR - http://www.scopus.com/inward/record.url?scp=85217932226&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85217932226&origin=recordpage
U2 - 10.1016/j.ensm.2025.104106
DO - 10.1016/j.ensm.2025.104106
M3 - RGC 21 - Publication in refereed journal
SN - 2405-8297
VL - 76
JO - Energy Storage Materials
JF - Energy Storage Materials
M1 - 104106
ER -