Nickel selenide nanorod arrays as an electrode material for lithium-ion batteries and supercapacitors

The Anode Materials for Lithium‐Ion and Sodium‐Ion Batteries Based on Conversion Reactions: a Review

“…Selenium is in the same main group as sulfur, so transition metal selenides (TMSes) share many chemical characteristics with sulfides. Selenides have gained a lot of interest as a conversion‐type electrode material in LiBs because it has higher density and conductivity than sulfur, and they may also have superior lithium storage kinetics and a higher volume energy density as an anode electrode material [90–93] …”

“…Selenides have gained a lot of interest as a conversion-type electrode material in LiBs because it has higher density and conductivity than sulfur, and they may also have superior lithium storage kinetics and a higher volume energy density as an anode electrode material. [90][91][92][93] Zhang et al synthesized a new structure for the yolk shell (i. e., Sb 2 Se 3 @void@C) as described in Figure 7a, which schematically depicts the formation process in which the buffer void between the carbon shell and the rod-like Sb 2 Se 3 yolk can offer sufficient space for volume adjustment, and the mesoporous, permeable carbon layer allows the electrolyte to enter the pore for electrochemical reaction with Sb 2 Se 3. At 200 mA g À 1 , the yolk-shell structured Sb 2 Se 3 @void@C nanorods (Figure 7d, e) remained structurally intact with no morphological damage compared to the pure Sb 2 Se 3 nanorod after 50 cycles (Figure 7b, c), effectively enhancing the structural stability.…”

Carbon‐Shielded Selenium‐Rich Trimetallic Selenides as Advanced Electrode Material for Durable Li‐Ion Batteries and Supercapacitors

“…[3] Compared to all metal-ion batteries, Li-ion batteries than metal sulfides and oxides. [16,23] The metal selenides also provide the facilitations in ionic movability for the insertion/ de-insertion and diffusion of Li + ions. Such a reaction mechanism in the metal selenides has been unveiled as a multistep process, including conversion and alloying/dealloying reactions.…”

“…[13] In contrast, for supercapacitors, electrode materials are normally conducting polymers, metal oxides, and carbon-based materials. However, discovering substitute electrode materials is still a significant concern for achieving the desired properties.Most recently, metal chalcogenides, for example, FeSe 2 , SnS 2 , and Ni 3 Se 2 , [14][15][16] mixed metal chalcogenides such as Cu 2 MoS 4 , NiCo 2 S 4 , and Cu 2 SnNiS 4 , [17][18][19] and composite mixed metal chalcogenides including Co 9 Se 8 /CdSe, CoNiSe 2 /Fe-CoNiSe 2 , and NiS 2 /CoS 2 [20][21][22] have been vigorously examined as electrode materials due to their superior theoretical capacity (over 600 mA h g −1 ). Nonetheless, metal selenides have more outstanding electrical conductivity and kinetic energy storage…”

Ni6Se5, an unexplored transition metal chalcogenide of formula M(n+1)X n (2 ≤ n ≤ 8), for high-performance hybrid supercapacitor and Li-ion battery application

“…A combination of NiSe 2 nanoparticles and rGO offers a specific capacitance of 115 Fg −1 at a current density of 1 Ag −1 with a specific capacity retention of 89% over 5000 cycles [38]. Ni x Se y nano-rod arrays demonstrate a specific capacity of 87 Cg −1 at a current density of 1 Ag −1 , in investigations of a hybrid SC device, and they demonstrate a high first discharge capacity of 632.8 mAhg −1 at 50 mAg −1 in LIB applications [39].…”