Effect of Mixed Li+/Na+-ion Electrolyte on Electrochemical Performance of Na4Fe3(PO4)2P2O7 in Hybrid Batteries

被引：15

作者：

Kosova, Nina, V ^{[1
]}

Shindrov, Alexander A. ^{[1
]}

机构：

[1] Inst Solid State Chem & Mechanochem SB RAS, 18 Kutateladze, Novosibirsk 630128, Russia

来源：

BATTERIES-BASEL | 2019年 / 5卷 / 02期

关键词：

Na4Fe3(PO4)(2)P2O7; hybrid Li; Na cell; mixed Li+; Na+-ion electrolyte; cycling; SODIUM-ION; LITHIUM; MECHANISM;

D O I：

10.3390/batteries5020039

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The mixed sodium-iron ortho-pyrophosphate Na4Fe3(PO4)(2)P2O7 (NFPP) is a promising Na-containing cathode material with the highest operating voltage among sodium framework structured materials. It operates both in Na and Li electrochemical cells. When cycled in a hybrid Li/Na cell, a competitive co-intercalation of the Li+ and Na+ ions occurs at the cathode side. The present study shows that this process can be tuned by changing the concentration of the Na+ ions in the mixed Li+/Na+-ion electrolyte and current density. It is shown that if the Na concentration in the electrolyte increases, the specific capacity of NFPP also increases and its high-rate capability is significantly improved.

引用

页数：9

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