A Practicable Li/Na-Ion Hybrid Full Battery Assembled by a High-Voltage Cathode and Commercial Graphite Anode: Superior Energy Storage Performance and Working Mechanism
A Practicable Li/Na-Ion Hybrid Full Battery Assembled by a High-Voltage Cathode and Commercial Graphite Anode: Superior Energy Storage Performance and Working Mechanism
复制标题
由高压正极和商用石墨负极组装而成的实用锂/钠离子混合全电池：优越的储能性能和工作机制
DOI：
10.1002/aenm.201702504
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发表时间：
2018-04-05
影响因子：
27.8
通讯作者：
Su, Zhong-Min
中科院分区：
文献类型：
--
作者：
Guo, Jin-Zhi;Yang, Yang;Su, Zhong-Min
随着低成本和安全能源存储需求的快速增长，先进的电池概念已经引发了超越最先进的锂离子电池（lib）的强烈兴趣。本文首次设计了一种由高能无锂Na3V2(PO4)(2)O2F （NVPOF）阴极和商用石墨阳极中间相碳微球组成的新型混合锂/钠离子全电池（HLNIB）。组装的hlnib具有两个高工作电压，分别为4.05和3.69 V，比容量为112.7 mA h g（-1）。其能量密度可达328 W h kg(-1)，以正极和负极材料的总质量计算。此外，hlnib还具有出色的高倍率性能、长循环寿命和优异的低温性能。此外，利用恒流间歇滴定技术和非原位x射线衍射对NVPOF的反应动力学和Li/ na插入/萃取机理进行了初步研究。这项工作为发展先进的混合动力电池提供了新的、深刻的方向。
With the rapidly growing demand for low-cost and safe energy storage, the advanced battery concepts have triggered strong interests beyond the state-of-the-art Li-ion batteries (LIBs). Herein, a novel hybrid Li/Na-ion full battery (HLNIB) composed of the high-energy and lithium-free Na3V2(PO4)(2)O2F (NVPOF) cathode and commercial graphite anode mesophase carbon micro beads is for the first time designed. The assembled HLNIBs exhibit two high working voltage at about 4.05 and 3.69 V with a specific capacity of 112.7 mA h g(-1). Its energy density can reach up to 328 W h kg(-1) calculated from the total mass of both cathode and anode materials. Moreover, the HLNIBs show outstanding high-rate capability, long-term cycle life, and excellent low-temperature performance. In addition, the reaction kinetics and Li/Na-insertion/extraction mechanism into/out NVPOF is preliminarily investigated by the galvanostatic intermittent titration technique and ex situ X-ray diffraction. This work provides a new and profound direction to develop advanced hybrid batteries.