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首页> 外文期刊>Advanced energy materials >Experimental Studies on Work Functions of Li~+ Ions and Electrons in the Battery Electrode Material LiCoO_2: A Thermodynamic Cycle Combining Ionic and Electronic Structure
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Experimental Studies on Work Functions of Li~+ Ions and Electrons in the Battery Electrode Material LiCoO_2: A Thermodynamic Cycle Combining Ionic and Electronic Structure

机译：电池电极材料LiCoO_2中Li〜+离子和电子的功函数的实验研究：结合离子和电子结构的热力学循环

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摘要

The release of Li+ from stoichiometric LiCoO2 (LCO) - a typical battery electrode material - is investigated by means of thermionic emission. Analysis of the data leads to an ionic work function of w(Li+)(LCO) = 4.1 eV. Combination of this value with the electronic work function w(e-) (LCO) = 5.1 eV, also measured in this work by photoelectron spectroscopy, and with information available from the literature allows the set up, for the first time, of a complete thermodynamic cycle for a Li//LiCoO2 battery. An open circuit cell voltage of 2.4 eV is derived in line with available literature information. The proof-of-principle study presented here provides experimental data on the binding energy values, i.e., chemical potentials, of Li+-ions and electrons and thus of Li-atoms in LiCoO2 as a battery cathode and is expected to open access to a better understanding and thus to a better design of battery materials.
机译：通过热电子发射研究了化学计量的LiCoO2（LCO）（一种典型的电池电极材料）中Li +的释放。数据分析导致离子功函数为w（Li +）（LCO）= 4.1 eV。该值与电子功函数w（e-）（LCO）= 5.1 eV的组合，也通过光电子能谱在此功中测量，并结合文献中的信息，首次建立了一个完整的Li // LiCoO2电池的热力学循环。根据可用的文献信息得出了2.4 eV的开路电池电压。本文介绍的原理验证研究提供了有关作为电池阴极的LiCoO2中Li +离子和电子的束缚能值（即化学势）的实验数据，因此也提供了Li原子的化学势，有望打开更好的途径。理解，从而更好地设计电池材料。

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