期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 6, 页码 5498-5510出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b15808
关键词
LiNi(0.5)Mna(0.3)Co(0.2)O(2)@NaTi2(PO4)(3); core shell architectures; high-voltage cathodes; surface modifications; lithium-ion batteries
资金
- National Natural Science Foundation of China [51772127, 51772131]
Surface modifications are established well as efficient methodologies to enhance comprehensive Li-storage behaviors of the cathodes and play a significant role in cutting edge innovations toward lithium-ion batteries (LIBs). Herein, we first logically devised a pilot-scale coating strategy to integrate solid-state electrolyte NaTi2(PO4)3 (NTP) and layered LiNi0.5Mn03Coo.202 (NMC) for smart construction of core shell NMC@NTP cathodes. The Nasicon-type NTP nanoshell with exceptional ion conductivity effectively suppressed gradual encroachment and/or loss of electroactive NMC, guaranteed stable phase interfaces, and meanwhile rendered small sur-/interfacial electron/ion-diffusion resistance. By benefiting from immanently promoting contributions of the nano-NTP coating, the as-fabricated core shell NMC@NTP architectures were competitively endowed with superior high-voltage cyclic stabilities and rate capacities within larger electrochemical window from 3.0 to 4.6 V when utilized as advanced cathodes for advanced LIBs. More meaningfully, the appealing electrode design concept proposed here will exert significant impact upon further constructing other high-voltage Ni-based cathodes for high-energy/power LIBs.
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