Hollow nanoporous red phosphorus as an advanced anode for sodium-ion batteries
Hollow nanoporous red phosphorus as an advanced anode for sodium-ion batteries
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空心纳米孔红磷作为钠离子电池的先进阳极
DOI：
10.1039/c8ta03301c
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发表时间：
2018-07-21
影响因子：
11.9
通讯作者：
Ci, Lijie
中科院分区：
文献类型：
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作者：
Liu, Shuai;Xu, Hui;Ci, Lijie
钠离子电池(SIB)作为锂离子电池(LIB)的潜在替代品，由于钠的低成本以及钠和锂相似的化学性质而受到越来越多的关注。开发高性能的阳极材料是SIB面临的主要挑战之一。红磷(RP)被认为是最有前途的SIB阳极之一，具有高的理论比容量约2600 mAh g(-1)，解决了充放电过程中体积变化大和电导率低的严峻挑战。在这里，我们通过结合典型的氧化还原反应和沸腾过程，展示了一种新型的少量碘掺杂的空心纳米多孔红磷(HNPRP)作为SIBS的先进阳极。作为钠离子电池负极，HNPRP在0.26A g(-1)下循环100次后容量高达1658.2 mA h g(-1)，在5.2A g(-1)下具有优异的倍率性能(759.6 mA h g(-1))和超长循环寿命(857.3 mA h g(-1))。优异的电化学性能归功于其创新的电极设计，确保了高钠离子可及性、强大的结构完整性和快速的电极传输。这种可扩展的策略将为制备用于SIB和其他储能系统的高性能电极铺平道路，为中空纳米孔结构的合成提供新的指导方针。
As a potential alternative to lithium-ion batteries (LIBs), sodium-ion batteries (SIBs) have received more and more attention due to the low cost of sodium and similar chemical properties of sodium and lithium. Developing high performance anode materials is one of the major challenges for SIBs. Red phosphorus (RP) is considered as one of the most promising anodes for SIBs with a high theoretical specific capacity of about 2600 mA h g(-1), tackling serious challenges, such as large volume change and low electrical conductivity during the charge-discharge process. Herein, we have demonstrated a novel hollow nanoporous red phosphorus (HNPRP) with a small amount of iodine doping as an advanced anode for SIBs via combining a typical redox reaction and boiling process. The HNPRP exhibits a high capacity of 1658.2 mA h g(-1) after 100 cycles at 0.26 A g(-1), superior rate capability (759.6 mA h g(-1) at 5.2 A g(-1)) and ultralong cycle-life (857.3 mA h g(-1) after 1000 cycles at 2.6 A g(-1)) as an anode for sodium-ion batteries (SIBs). The excellent electrochemical performance is due to its innovative electrode design, which ensures high sodium ion accessibility, strong structural integrity and fast electrode transport. The scalable strategy shall pave the way for the preparation of high performance electrodes for SIBs and other energy storage systems, providing new guidelines for the synthesis of hollow nanoporous structures.