The huge consumption of rechargeable Li‐ion batteries (LIBs) make it necessary to recover and reuse the different components of spent batteries, thus favoring sustainable development. Graphite is a critical material in the manufacture of the current LIBs so recycling it should be prioritized in the management of spent batteries. In this work, graphite is manually recovered from spent batteries used in smartphones. The impurities from the different components of the batteries are drastically reduced by simple leaching with HCl. This treatment significantly improves the delivered specific capacity, with average values of 300 and 390 mAh g⁻¹ without and with leaching, respectively. To test recycled graphite as an anode material in real cells, it is paired with LiNi_0.5Mn_1.5O₄, the most promising cathode material for high‐voltage batteries. LiCl, produced directly by chlorination of spodumene, is used as the Li source to obtain the spinel sample. The real cell gives satisfactory values for both initial specific capacity (100 mAh g⁻¹) and capacity retention after 100 cycles. These results are comparable to and in some cases even better than those for cells that use commercial graphite and conventional Li sources as primary raw materials. Moreover, the cell shows good performance during the rate capability test; the delivered capacity values decrease smoothly from 73 to 62 mAh g⁻¹ while the rate increases from 0.1 to 1 C.

中文翻译：

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电极材料的简单环保制造及其在高压锂离子电池中的性能

锂离子充电电池（LIB）的大量消耗使得必须回收和再利用废旧电池的不同组件，从而有利于可持续发展。石墨是当前LIB制造中的关键材料，因此应优先处理废旧电池。在这项工作中，可以从智能手机中使用的废电池中手动回收石墨。通过用HCl进行简单浸提，可大大减少来自电池不同组件的杂质。该处理显着提高了递送的比容量，分别具有300和390 mAh g ^-1的平均值，无浸出和有浸出。为了测试回收的石墨作为实际电池中的阳极材料，将其与LiNi _0.5 Mn _1.5配对O ₄是高压电池最有希望的正极材料。锂辉石直接氯化生成的LiCl用作锂源，获得尖晶石样品。实际电池对于初始比容量（100 mAh g ^-1）和100次循环后的容量保持率均给出令人满意的值。这些结果与使用商业石墨和常规锂源作为主要原料的电池相比，甚至在某些情况下甚至更好。此外，该电池在速率能力测试期间显示出良好的性能；输送容量值从73 mAh g ^-1平稳降低，而速率从0.1 C升高至1C。