Structure and electrochemistry of copper fluoride nanocomposites utilizing mixed conducting matrices
Structure and electrochemistry of copper fluoride nanocomposites utilizing mixed conducting matrices
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DOI：
10.1021/cm070421g
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发表时间：
2007-08-21
影响因子：
8.6
通讯作者：
Amatucci, G. G.
中科院分区：
文献类型：
--
作者：
Badway, F.;Mansour, A. N.;Amatucci, G. G.
通过在金属氧化物的混合离子+电子导电基质中使用由 2-30 nm CuF2 域组成的纳米复合材料，可以接近理论地利用高能量密度 CuF2 正极材料用于锂电池。我们发现所有基于氧化物的基体中都会发生 CuF2 核心晶体的微小但显着的晶体学变化。通过一系列表征方法（包括 XRD、XPS 和 XAS）研究了对核心晶体和周围基质的这些修饰。这种实现无水 CuF2 的新方法在性能上明显优于利用碳作为基质的大 CuF2 或 CuF2 纳米复合材料，后者也是本文首次引入。
Near-theoretical utilization of high-energy-density CuF2 positive electrode materials for lithium batteries was enabled through the use of nanocomposites consisting of 2-30 nm domains of CuF2 within a mixed ionic + electronic conducting matrix of a metal oxide. Small but significant crystallographic changes to the core crystal of the CuF2 were found to occur in all oxide-based matrices. These modifications to the core crystal and the surrounding matrix were investigated through a host of characterization methods, including XRD, XPS, and XAS. This new approach to the enablement of the anhydrous CuF2 is distinctly superior in performance to that of macro CuF2 or CuF2 nanocomposites utilizing carbon as a matrix, the latter of which is also introduced herein for the first time.