Pre-Lithiation Strategies and Energy Density Theory of Lithium-Ion and Beyond Lithium-Ion Batteries
Pre-Lithiation Strategies and Energy Density Theory of Lithium-Ion and Beyond Lithium-Ion Batteries
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锂离子及其他锂离子电池的预锂化策略和能量密度理论
DOI：
10.1149/1945-7111/ac6540
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发表时间：
2022
影响因子：
3.9
通讯作者：
Zhang, Cunman
中科院分区：
文献类型：
--
作者：
Zheng, Jim P.;Andrei, Petru;Jin, Liming;Zheng, Junsheng;Zhang, Cunman
预锂化是克服高容量电极初始容量损失的最有效方法，具有用于超常规锂离子电池的潜力。在这篇文章中，我们专注于两种类型的预锂化：第一种类型可以应用于阴极已经完全锂化但阳极具有较大初始容量损失的电池，例如由锂金属氧化物阴极和硅碳阳极制成的电池。第二种类型可以应用于其中两个电极最初都不含锂并且在初始循环期间遭受锂损失的电池，例如用硫化聚丙烯腈阴极和硅-碳阳极制成的电池。我们描述了预锂化过程和预锂化期间的电极电位曲线，对应于两种类型预锂化的不同预锂化源。我们还推导出理论比能量和能量密度的公式，这些公式完全基于可测量的参数，如比容量、孔隙率、两个电极和额外锂源的质量密度、电极的库仑效率和电池的电压。这些公式可以应用于不同的预锂化源，以预测常规和超常规锂离子电池的比能量作为预锂化类型的函数。
Pre-lithiation is the most effective method to overcome the initial capacity loss of high-capacity electrodes and has the potential to be used in beyond-conventional lithium-ion batteries. In this article we focus on two types of pre-lithiation: the first type can be applied to batteries in which the cathode has been fully lithiated but the anode has a large initial capacity loss, such as batteries made with lithium metal oxide cathode and silicon-carbon anode. The second type can be applied to batteries in which both electrodes are initially lithium-free and suffer a loss of lithium during the initial cycles, such as batteries made with sulfurized-polyacrylonitrile cathode and silicon-carbon anode. We describe the pre-lithiation procedures and electrode potential profiles during pre-lithiation corresponding to different pre-lithiation sources for both types of pre-lithiation. We also derive formulas for the theoretical specific energy and energy density that are based entirely on measurable parameters such as specific capacities, porosities, mass densities of two electrodes and extra lithium source, Coulombic efficiencies of electrodes, and the voltage of the cell. These formulas can be applied to different pre-lithiation sources to predict the specific energy of conventional and beyond-conventional lithium-ion batteries as a function of the type of pre-lithiation.