Phytate lithium as a multifunctional additive stabilizes LiCoO2 to 4.6 V

Zhang, Fangchang1; Qin, Ning1; Li, Yingzhi1; Guo, Hao2; Gan, Qingmeng1; Zeng, Chun1; Li, Zhiqiang1; Wang, Zhenyu1; Wang, Ruo1; Liu, Guiyu1; Gu, Shuai1; Huang, He1; Yang, Zelin2; Wang, Jun1; Deng, Yonghong1; Lu, Zhouguang1

2023-06-01

10.1039/d3ee01209c

ENERGY & ENVIRONMENTAL SCIENCE   影响因子和分区

1754-5692

1754-5706

The practical application of LiCoO2 at 4.6 V suffers from the devastating H1-3 metastable phase transition, severe interfacial side reactions due to aggressive oxygen species and cobalt loss, as well as thermal run-away in commercial scenarios. Herein, the multifunctional additive phytate lithium (PL) is proposed to tackle the aforementioned issues. The strong chelating capability of PL for Co significantly enhances the structural stability, inhibiting the detrimental H1-3 phase transition and cobalt dissolution. Moreover, benefiting from the PL-enabled robust cathode-electrolyte-interphase and oxygen radical annihilation ability of PL, the parasitic interfacial side reactions are considerably suppressed. Moreover, the flame-retardant property of PL is favorable to improving the thermal stability of LIBs. As a result, the PL-reinforced LiCoO2 demonstrates an excellent cyclic performance with a capacity retention of almost 90% after 200 cycles at 4.6 V. More importantly, a pouch cell consisting of a PL-LCO cathode and a Li anode achieves an extremely high energy density of 503 W h kg(-1) and an impressive cycling performance with a capacity retention of 86.5% after 100 cycles. This cathode additive strategy provides a simple and compatible strategy for current industrial manufacturing to stabilize the 4.6 V LiCoO2.

SCI ; EI

英语

第一 ; 通讯

Basic Research Project of the Science and Technology Innovation Commission of Shenzhen[JCYJ20220818100418040] ; Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials[ZDSYS20200421111401738] ; National Natural Science Foundation of China[U22A20439] ; Jiangsu Key Laboratory of Electrochemical Energy-Storage Technologies[EEST2021-1] ; Innovation Zone program of China[22-TQ06-02-ZT-01-017-01]

Chemistry ; Energy & Fuels ; Engineering ; Environmental Sciences & Ecology

Chemistry, Multidisciplinary ; Energy & Fuels ; Engineering, Chemical ; Environmental Sciences

WOS:001020547000001

ROYAL SOC CHEMISTRY

20232914420705

Additives ; Cathodes ; Cobalt ; Cobalt compounds ; Electrolytes ; Lithium compounds ; Oxygen ; Thermodynamic stability

Lithium and Alloys:542.4 ; Alkali Metals:549.1 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Thermodynamics:641.1 ; Electric Batteries and Fuel Cells:702 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen Key Lab Interfacial Sci & Engn Mat, Shenzhen 518055, Peoples R China
2.State Key Lab Adv Chem Power Sources, Zunyi 563003, Guizhou, Peoples R China

Zhang, Fangchang,Qin, Ning,Li, Yingzhi,et al. Phytate lithium as a multifunctional additive stabilizes LiCoO2 to 4.6 V[J]. ENERGY & ENVIRONMENTAL SCIENCE,2023,16(10):4345-4355.

Zhang, Fangchang.,Qin, Ning.,Li, Yingzhi.,Guo, Hao.,Gan, Qingmeng.,...&Lu, Zhouguang.(2023).Phytate lithium as a multifunctional additive stabilizes LiCoO2 to 4.6 V.ENERGY & ENVIRONMENTAL SCIENCE,16(10),4345-4355.

Zhang, Fangchang,et al."Phytate lithium as a multifunctional additive stabilizes LiCoO2 to 4.6 V".ENERGY & ENVIRONMENTAL SCIENCE 16.10(2023):4345-4355.