Abstract Evolution of domestic wastes into competitive battery materials at less expense is a rational strategy of "killing two birds with one stone", and never better for grid-scale energy-storage utilizations wherein achieving great energy density is less crucial than environmental friendliness and cost. To checkout this concept, we herein select Fe2N, a conductive conversion-type anode for Li-/Na-ion batteries (LIBs/SIBs), as a paradigm study. Rusty/plastic wastes-evolved anodes with a proper tap density of 1.74 g cm−3 are composed of numerous nanoparticles where each Fe2N unit is evenly configured in robust carbon sheath. Such electrodes demonstrate impressive specific capacities under varied areal mass loading ratios of 3∼15 mg cm-2, outstanding rate capabilities and cyclic stability. To judge their promise in practical usage, we successively choose economical LiFePO4 and phase-stable Na3V2(PO4)3 as pairing cathodes to build full-cell LIBs/SIBs. This wastes-to-battery protocol may pave a way to advance practical techniques for sustainable usage beyond.

中文翻译：

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生活垃圾衍生的 Fe2N@Carbon 混合材料能否作为可持续锂/钠存储应用的有竞争力的负极？

摘要 将生活垃圾以较低成本转化为具有竞争力的电池材料是“一石二鸟”的合理策略，对于电网规模的储能利用来说永远不会更好，其中实现高能量密度不如环境友好和成本重要。 . 为了验证这个概念，我们在此选择 Fe2N，一种用于锂/钠离子电池 (LIBs/SIBs) 的导电转换型阳极，作为范例研究。具有 1.74 g cm-3 适当振实密度的生锈/塑料废物演化阳极由许多纳米粒子组成，其中每个 Fe2N 单元均匀配置在坚固的碳鞘中。这种电极在 3~15 mg cm-2 的不同面积质量负载比下表现出令人印象深刻的比容量、出色的倍率能力和循环稳定性。在实际使用中判断他们的承诺，我们先后选择经济的 LiFePO4 和相稳定的 Na3V2(PO4)3 作为配对正极来构建全电池 LIBs/SIBs。这种废物到电池协议可能会为推进可持续使用的实用技术铺平道路。