Fabrication of van der Waals Heterostructured FePSe3/Carbon Hybrid Nanosheets for Sodium Storage with High Performance,ACS Applied Materials & Interfaces

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Fabrication of van der Waals Heterostructured FePSe3/Carbon Hybrid Nanosheets for Sodium Storage with High Performance
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-11-23 , DOI: 10.1021/acsami.0c16396
Shiqi Xing _{1,

2,

3} , Jing Yang _{1,

2,

3} , Chunde Wang _{1,

2,

3} , Jianbin Zhou _{1,

2} , Jinhui Zhang _{1,

2,

3} , Li Zhang _{1,

2,

3} , Qing Yang _{1,

2,

3}

Affiliation

Iron phosphorus triselenide (FePSe₃) is attractive for energy applications owing to its interesting layered geometry, electronic structure, and physiochemical property, while it is limited in actual application because of a very long fabrication time of over 7 days. Herein, we report a new synthetic route to a high-quality sheetlike hybrid of iron phosphorus triselenide nanocrystals coated with graphitic carbon (FePSe₃/C) as an alternative kind of van der Waals heterostructures for the first time via a pyrolytic process at 600 °C from the precursors of ferrocene, red phosphorus, and selenium in a quartz tube with a significantly shortened reaction time of 24 h and even down to 30 min. Investigations demonstrated that the component phase of FePSe₃ in the layered FePSe₃/C hybrid nanosheets is the rhombohedral phase, and the hybrid nanosheets other than bulk crystals are about 15 nm in thickness. Acting as a cathode in fabricating half-cell sodium-ion batteries, the layered FePSe₃/C hybrid nanosheets exhibited remarkable performance. Typically, when current density was set as 50 mA g^–1, the hybrid nanosheet-assembled battery exhibited a capacity of 182.7 mA h g^–1 after performing over 50 cycles, and the nanosheet battery exhibited a capacity of 142 mA h g^–1 after performing for 200 cycling trials at 1 A g^–1 in the 0.8–2.2 V voltage window. Meanwhile, the layered FePSe₃/C hybrid nanosheets also exhibited very high rate capabilities at a relatively large current density in the present study, that is, 172 and 95 mA h g^–1 under typical performing conditions at 0.5 and 5 A g^–1, respectively.

中文翻译：

Van der Waals异质结构FePSe ₃ /碳杂化纳米片的高性能钠存储工艺

铁三硒化铁（FePSe ₃）由于其有趣的分层几何结构，电子结构和理化性质而吸引了能源应用，而由于其制造时间超过7天，因此在实际应用中受到限制。在此，我们首次报道了一种新的合成路线，该路线是通过600°C的热解工艺首次获得了一种覆盖石墨碳（FePSe ₃ / C）的高质量片状杂化铁三硒化铁纳米晶，作为范德华异质结构的替代形式。在石英管中由二茂铁，红磷和硒的前体产生碳，反应时间大大缩短，为24小时，甚至低至30分钟。研究表明，FePSe ₃的组分相层状FePSe ₃ / C杂化纳米片中的“杂化”纳米片是菱形面相，除体晶体以外的杂化纳米片的厚度约为15nm。FePSe ₃ / C杂化纳米片层在制造半电池钠离子电池中充当阴极，表现出非凡的性能。通常，当电流密度设定为50毫安克^-1，混合纳米片组装电池显示182.7毫安Hg的容量^-1进行50个循环后，将纳米片电池显示142毫安Hg的容量^-1执行后在0.8–2.2 V电压窗口中以1 A g ^–1进行200次循环试验。同时，FePSe ₃分层在本研究中，/ C杂化纳米片在相对大的电流密度下也显示出很高的倍率能力，即在典型的工作条件下分别为0.5和5 A g ^–1时分别为172和95 mA hg ^–1。

更新日期：2020-12-09

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