Micro-nano Cu2Se as a stable and ultralong cycle life anode material for sodium-ion batteries

Ordered Vacancies as Sodium Ion Micropumps in Cu‐Deficient Copper Indium Diselenide to Enhance Sodium Storage

“…In addition, the rate performance of Cu 0.54 In 1.15 Se 2 is superior to other advanced anodes in SIBs (Figure S24, Supporting Information). [45,[47][48][49][50][51][52] Figure 4d illustrates the cycling performance and corresponding Coulombic efficiency (CE) of Cu 0.54 In 1.15 Se 2 at 1 A g −1 , which displays a reversible capacity of 428 mAh g −1 after 1000 cycles. The initial CE could reach as high as 87.5%, much better than other anode materials for SIBs, [45,[47][48][49][50][51][52] and from the second cycle, the CE is stable at ≈100%.…”

“…[45,[47][48][49][50][51][52] Figure 4d illustrates the cycling performance and corresponding Coulombic efficiency (CE) of Cu 0.54 In 1.15 Se 2 at 1 A g −1 , which displays a reversible capacity of 428 mAh g −1 after 1000 cycles. The initial CE could reach as high as 87.5%, much better than other anode materials for SIBs, [45,[47][48][49][50][51][52] and from the second cycle, the CE is stable at ≈100%. Obviously, Cu 0.54 In 1.15 Se 2 is able to release almost all stored Na + ions and improve the assembled full batteries.…”

“…In addition, the rate performance of Cu 0.54 In 1.15 Se 2 is superior to other advanced anodes in SIBs (Figure S24, Supporting Information). [ 45,47–52 ]…”

Transport properties of mechanochemically synthesized copper (I) selenide for potential applications in energy conversion and storage

“…Later in 2011–12, Gulay and co-authors reported the monoclinic phase at room temperature [ 9 ], and Liu and co-workers cubic anti-fluorite Cu 2 Se structure at 450 K [ 10 ]. The Cu 2 Se preparation methods as a solvothermal [ 11 ], hydrothermal [ 12 , 13 ], microwave-assisted hydrothermal method [ 14 , 15 ], electrodeposition [ 16 ], chemical bath deposition [ 17 ], chemical synthesis reduction [ 18 , 19 ], thermal evaporation [ 20 ], magnetron sputtering [ 21 ], solid-state reaction with pulsed laser deposition [ 22 ], microwave heating [ 23 ], and classical melting, annealing or sintering [ 24 – 26 ] were used in the last 10 years. However, most of these methods of Cu 2 Se preparation needed expensive equipment or a complicated post-treatment process.…”

Constructing SnO2–MoSe2heterojunction nanoflowers as high-rate and ultrastable anodes for sodium-ion half/full batteries

“…10,11 Recent studies have shown that a defect-rich interface within the heterojunction can provide more redox active sites, thereby promoting the Na + ion adsorption capacity and reaction kinetics. [12][13][14][15] Jiao's group reported that the SnSe 2 /ZnSe@PDA nanobox could deliver an outstanding capacity of 616 mA h g −1 at 1 A g −1 over 1000 cycles, and it is demonstrated that the material exhibits excellent reaction kinetics and physicochemical stability. 16 Li and co-workers prepared SnO 2 /SnSe 2 @C heterostructure nanoparticles as energy storage materials for SIBs, which maintained a superior rate of 322 mA h g −1 at 4.0 A g −1 .…”