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N/O Dual-Doped Environment-Friendly Hard Carbon as Advanced Anode for Potassium-Ion Batteries.
Advanced Science ( IF 14.3 ) Pub Date : 2020-01-09 , DOI: 10.1002/advs.201902547 Rong Chao Cui 1 , Bo Xu 1 , Hou Ji Dong 1 , Chun Cheng Yang 1 , Qing Jiang 1
Advanced Science ( IF 14.3 ) Pub Date : 2020-01-09 , DOI: 10.1002/advs.201902547 Rong Chao Cui 1 , Bo Xu 1 , Hou Ji Dong 1 , Chun Cheng Yang 1 , Qing Jiang 1
Affiliation
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Potassium-ion batteries (PIBs) are considered as promising candidates for lithium-ion batteries due to the abundant reserve and lower cost of K resources. However, K+ exhibits a larger radius than that of Li+, which may impede the intercalation of K+ into the electrode, thus resulting in poor cycling stability of PIBs. Here, an N/O dual-doped hard carbon (NOHC) is constructed by carbonizing the renewable piths of sorghum stalks. As a PIB anode, NOHC presents a high reversible capacity (304.6 mAh g-1 at 0.1 A g-1 after 100 cycles) and superior cycling stability (189.5 mAh g-1 at 1 A g-1 after 5000 cycles). The impressive electrochemical performances can be ascribed to the super-stable porous structure, expanded interlayer space, and N/O dual-doping. More importantly, the NOHC can be prepared in large scale in a concise way, showing great potential for commercialization applications. This work may impel the development of low-cost and sustainable carbon-based materials for PIBs and other advanced energy storage devices.
中文翻译：
N/O双掺杂环保硬碳作为钾离子电池的先进阳极。
由于钾资源储量丰富且成本较低，钾离子电池（PIB）被认为是锂离子电池的有前途的候选者。然而，K+的半径比Li+的半径大，这可能会阻碍K+嵌入电极，从而导致PIB的循环稳定性差。在这里，N/O双掺杂硬碳（NOHC）是通过碳化高粱秆的可再生髓而构建的。作为 PIB 负极，NOHC 具有高可逆容量（100 次循环后，0.1 A g-1 下为 304.6 mAh g-1）和优异的循环稳定性（5000 次循环后，1 A g-1 下为 189.5 mAh g-1）。令人印象深刻的电化学性能可归因于超稳定的多孔结构、扩大的层间空间和N/O双掺杂。更重要的是，NOHC可以以简洁的方式大规模制备，显示出巨大的商业化应用潜力。这项工作可能会推动用于 PIB 和其他先进储能设备的低成本且可持续的碳基材料的开发。
更新日期：2020-01-09
中文翻译：
N/O双掺杂环保硬碳作为钾离子电池的先进阳极。
由于钾资源储量丰富且成本较低，钾离子电池（PIB）被认为是锂离子电池的有前途的候选者。然而，K+的半径比Li+的半径大，这可能会阻碍K+嵌入电极，从而导致PIB的循环稳定性差。在这里，N/O双掺杂硬碳（NOHC）是通过碳化高粱秆的可再生髓而构建的。作为 PIB 负极，NOHC 具有高可逆容量（100 次循环后，0.1 A g-1 下为 304.6 mAh g-1）和优异的循环稳定性（5000 次循环后，1 A g-1 下为 189.5 mAh g-1）。令人印象深刻的电化学性能可归因于超稳定的多孔结构、扩大的层间空间和N/O双掺杂。更重要的是，NOHC可以以简洁的方式大规模制备，显示出巨大的商业化应用潜力。这项工作可能会推动用于 PIB 和其他先进储能设备的低成本且可持续的碳基材料的开发。
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