Copper selenide (Cu3Se2 and Cu2−xSe) thin films: electrochemical deposition and electrocatalytic application in quantum dot-sensitized solar cells

Zhou, Ru; Huang, Yuanzhang; Zhou, Juntian; Niu, Haihong; Wan, Lei; Li, Yuan; Xu, Jun; Xu, Jinzhang

doi:10.1039/c8dt03791d

Cited by 41 publications

(24 citation statements)

References 56 publications

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“…The Raman spectrum (Figure S1, Supporting Information) shows a strong peak located at 258.9 cm −1 originated from the stretching vibration of Se–Se bonds. [ 21 ] XPS analysis (Figure S2, Supporting Information) were used to identify the compositions and chemical states of the elements in Cu 2– x Se nanoplates, confirming the presence of Cu and Se elements. The high‐resolution XPS spectra of Cu 2p and Se 3d are provided in Figure 1h,i.…”

Section: Resultsmentioning

confidence: 95%

Electrochemical Mg²⁺ Displacement Driven Reversible Copper Extrusion/Intrusion Reactions for High‐Rate Rechargeable Magnesium Batteries

Xue

Chen

Song

et al. 2020

Adv Funct Materials

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Rechargeable magnesium batteries (RMBs) based on metal Mg anodes have shown great potential owing to the abundant natural resources, high volumetric capacity, and low safety hazard. Nevertheless, the development of RMBs is hampered by the sluggish kinetics of Mg2+ diffusion and the limited cyclability of cathode materials. Herein, nonstoichiometric copper selenide (Cu2–xSe) are synthesized via a solution‐based method and exploited as a durable cathode material based on ionic displacement mechanism for RMBs. The copper ions in the Se2− based sub‐lattices are reversibly exchanged by Mg2+ ions without causing lattice collapse. Owing to the same face‐centered cubic Se2− sub‐lattices and similar unit cell size of Cu2–xSe and MgSe, the energy barrier for lattice reconstruction during cycling processes is very low, significantly improving the rate performance, structural stability, and cycle life of the Cu2–xSe cathode. Moreover, metal Cu is in situ generated during discharging, thus greatly facilitating electron transport. Comprehensive characterizations confirm that the Cu2–xSe cathode undergoes reversible copper ion extrusion/reinjection during the discharge−charge steps. This work suggests the great potential for exploring high‐performance electrode materials based on ionic displacement mechanism for advanced multivalent‐ion secondary batteries.

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Section: Resultsmentioning

confidence: 95%

Electrochemical Mg²⁺ Displacement Driven Reversible Copper Extrusion/Intrusion Reactions for High‐Rate Rechargeable Magnesium Batteries

Xue

Chen

Song

et al. 2020

Adv Funct Materials

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“…TMSels may also offer high volumetric energy density because of the relatively high density of selenium (4.81 g cm −3 ) . Copper selenides are an important category of anisotropic p‐type semiconductor showing important applications in solar cells, gas sensors, photocatalysts, and electrochemical energy storage . For example, hierarchical self‐decorated Cu 2− x Se nanosheets delivered a discharge capacity of nearly 400 mA h g −1 in LIBs .…”

Section: Introductionmentioning

confidence: 99%

Nanosheets‐Assembled CuSe Crystal Pillar as a Stable and High‐Power Anode for Sodium‐Ion and Potassium‐Ion Batteries

Lin

Yang

et al. 2019

Advanced Energy Materials

194

142

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Thanks to low costs and the abundance of the resources, sodium‐ion (SIBs) and potassium‐ion batteries (PIBs) have emerged as leading candidates for next‐generation energy storage devices. So far, only few materials can serve as the host for both Na+ and K+ ions. Herein, a cubic phase CuSe with crystal‐pillar‐like morphology (CPL‐CuSe) assembled by the nanosheets are synthesized and its dual functionality in SIBs and PIBs is comprehensively studied. The electrochemical measurements demonstrate that CPL‐CuSe enables fast Na+ and K+ storage as well as the sufficiently long duration. Specifically, the anode delivers a specific capacity of 295 mA h g−1 at current density of 10 A g−1 in SIBs, while 280 mA h g−1 at 5 A g−1 in PIBs, as well as the high capacity retention of nearly 100% over 1200 cycles and 340 cycles, respectively. Remarkably, CPL‐CuSe exhibits a high initial coulombic efficiency of 91.0% (SIBs) and 92.4% (PIBs), superior to most existing selenide anodes. A combination of in situ X‐ray diffraction and ex situ transmission electron microscopy tests fundamentally reveal the structural transition and phase evolution of CuSe, which shows a reversible conversion reaction for both cells, while the intermediate products are different due to the sluggish K+ insertion reaction.

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“…On the contrary, selenium, located below oxygen in the chalcogenide series in the periodic table of elements, shows higher metallicity and covalency than others. [ 1,5–7 ] Even though copper sulfide and copper selenide have similar structures, the electrical conductivity of copper selenide is higher than copper sulfide. [ 7 ]…”

Section: Introductionmentioning

confidence: 99%

“…[ 1,5–7 ] Even though copper sulfide and copper selenide have similar structures, the electrical conductivity of copper selenide is higher than copper sulfide. [ 7 ]…”

Section: Introductionmentioning

confidence: 99%

Tailoring the Surface Characteristics of CuSe Thin Films by Adjusting the Compositional Ratio

Lee

Kim

Park

et al. 2021

Physica Status Solidi (a)

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Using radio frequency (RF) magnetron cosputtering, copper selenide thin films (TFs) with various ratios of Se are fabricated herein. To observe how the chemical and physical properties change based on morphology, the ratio of metallic Cu to nonmetallic Se is tuned to form multiple different compositions. The compositional percentage of the surface is determined by X‐ray photoelectron spectroscopy (XPS). Noticeable transitions of the characteristics of TFs are affected by Cu to a higher degree than Se. Larger grain sizes are observed when the Se ratio is high in Cu‐rich TFs. Most copper selenide TFs are hydrophobic and portray these characteristics the strongest when the surface Se ratio of TF is 16.62% as the contact angle with distilled water is 129°. In addition, the electrical conductivity is the highest at 2.04 (±0.13) × 107 S m−1 when the surface Se ratio is 10.95%.

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Copper selenide (Cu₃Se₂ and Cu_2−xSe) thin films: electrochemical deposition and electrocatalytic application in quantum dot-sensitized solar cells

Abstract: Electrodeposited copper selenide (Cu3Se2 and Cu2−xSe) thin films have been successfully fabricated and demonstrated as promising counter electrodes for QDSCs.

Cited by 41 publications

References 56 publications

Electrochemical Mg²⁺ Displacement Driven Reversible Copper Extrusion/Intrusion Reactions for High‐Rate Rechargeable Magnesium Batteries

Electrochemical Mg²⁺ Displacement Driven Reversible Copper Extrusion/Intrusion Reactions for High‐Rate Rechargeable Magnesium Batteries

Nanosheets‐Assembled CuSe Crystal Pillar as a Stable and High‐Power Anode for Sodium‐Ion and Potassium‐Ion Batteries

Tailoring the Surface Characteristics of CuSe Thin Films by Adjusting the Compositional Ratio

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Copper selenide (Cu3Se2 and Cu2−xSe) thin films: electrochemical deposition and electrocatalytic application in quantum dot-sensitized solar cells

Abstract: Electrodeposited copper selenide (Cu3Se2 and Cu2−xSe) thin films have been successfully fabricated and demonstrated as promising counter electrodes for QDSCs.

Cited by 41 publications

References 56 publications

Electrochemical Mg2+ Displacement Driven Reversible Copper Extrusion/Intrusion Reactions for High‐Rate Rechargeable Magnesium Batteries

Electrochemical Mg2+ Displacement Driven Reversible Copper Extrusion/Intrusion Reactions for High‐Rate Rechargeable Magnesium Batteries

Nanosheets‐Assembled CuSe Crystal Pillar as a Stable and High‐Power Anode for Sodium‐Ion and Potassium‐Ion Batteries

Tailoring the Surface Characteristics of CuSe Thin Films by Adjusting the Compositional Ratio

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Copper selenide (Cu₃Se₂ and Cu_2−xSe) thin films: electrochemical deposition and electrocatalytic application in quantum dot-sensitized solar cells

Electrochemical Mg²⁺ Displacement Driven Reversible Copper Extrusion/Intrusion Reactions for High‐Rate Rechargeable Magnesium Batteries

Electrochemical Mg²⁺ Displacement Driven Reversible Copper Extrusion/Intrusion Reactions for High‐Rate Rechargeable Magnesium Batteries