High-Performance Low-Temperature Li+ Intercalation in Disordered Rock-Salt Li-Cr-V Oxyfluorides

被引：35

作者：

Chen, Ruiyong ^{[1
,2
,3
]}

Ren, Shuhua ^{[2
]}

Mu, Xiaoke ^{[2
]}

Maawad, Emad ^{[4
]}

Zander, Stefan ^{[5
]}

Hempelmann, Rolf ^{[3
]}

Hahn, Horst ^{[1
,2
]}

机构：

[1] Helmholtz Inst Ulm, Helmholtzstr 11, D-89081 Ulm, Germany

[2] Karlsruhe Inst Technol, Inst Nanotechnol, Hermann von Helmholtz Pl 1, D-76021 Karlsruhe, Germany

[3] Univ Saarland, KIST Europe, Joint Electrochem Lab, Campus E7 1, D-66123 Saarbrucken, Germany

[4] Helmholtz Zentrum Geesthacht, Inst Mat Res, Notkestr 85, D-22607 Hamburg, Germany

[5] Helmholtz Zentrum Berlin Mat & Energie, Struct & Dynam Energy Mat, Albert Einstein Str 15, D-12489 Berlin, Germany

来源：

CHEMELECTROCHEM | 2016年 / 3卷 / 06期

关键词：

disordered rock-salt structure; intercalation cathode; lithium-ion batteries; low temperature; oxyfluorides; LITHIUM-ION BATTERIES; CATHODE; ELECTROLYTES; ELECTRODES; OXIDES;

D O I：

10.1002/celc.201600033

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

At -10 degrees C and 26 mAg(-1), Li2Cr0.2V0.8O2F can deliver a stable high capacity of 250 mAhg(-1) (or 690 Whkg(-1)) over 60 cycles. Even at -20 degrees C and a current density of 106 mAg(-1), it still delivers a steady capacity and specific energy of about 160 mAhg(-1) and 400 Whkg(-1), respectively, over 100 cycles. Superior performance of Li2Cr0.2V0.8O2F over Li2VO2F and Li2CrO2F is related to its structural stability and electronic properties.

引用

页码：892 / 895

页数：4

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