ADVANCED MATERIALS
·
2019
·Vol. 32
·期 4
·1904876
·
IF 25.809
Yuan Tian,Gaoran Li,Yongguang Zhang,Dan Luo,Xin Wang,Yan Zhao,Hui Liu,Puguang Ji,Xiaohang Du,Jingde Li,Zhongwei Chen
The shuttling behavior and sluggish conversion kinetics of the intermediate lithium polysulfides (LiPSs) represent the main obstructions to the practical application of lithium–sulfur (Li–S) batteries. Herein, an anion-deficient design of antimony selenide (Sb 2 Se 3− x ) is developed to establish a multifunctional LiPS barrier toward the inhibition of polysulfide shuttling and enhancement of battery performance. The defect chemistry in the as-developed Sb 2 Se 3− x promotes the intrinsic conductivity, strengthens the chemical affinity to LiPSs, and catalyzes the sulfur electrochemical conversion, which are verified by a series of computational and experimental results. Attributed to these unique superiorities, the obtained LiPS barrier efficiently promotes and stabilizes the sulfur electrochemistry, thus enabling excellent Li–S battery performance, e.g., outstanding cyclability over 500 cycles at 1.0 C with a minimum capacity fading rate of 0.027% per cycle, a superb rate capability up to 8.0 C, and a high areal capacity of 7.46 mAh cm −2 under raised sulfur loading. This work offers a defect engineering strategy toward fast and durable sulfur electrochemistry, holding great promise in developing practically viable Li–S batteries as well as enlightening the material design of related energy storage and conversion systems.
研究领域:
电化学储能
·
材料科学
·
纳米能源材料
·
固态离子学
·
电池技术
✓ 已验证
DOI
高影响因子
Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-20
·
IF 36.3
Liang Puwu,Pan Duo,Hu Xiang,Yang Ke R.,Liu Yangjie,Huo Zijing,Bo Zheng,Xu Lihong,Xu Junhua,Wen Zhenhai
Manganese-based chalcogenides have significant potential as anodes for sodium-ion batteries (SIBs) due to their high theoretical specific capacity, abundant natural reserves, and environmental friendliness. However, their application is hindered by poor cycling stability, resulting from severe volume changes during cycling and slow reaction kinetics due to their complex crystal structure. Here, an efficient and straightforward strategy was employed to in-situ encapsulate single-phase porous nanocubic MnS 0.5 Se 0.5 into carbon nanofibers using electrospinning and the hard template method, thus forming a necklace-like porous MnS 0.5 Se 0.5 -carbon nanofiber composite (MnS 0.5 Se 0.5 @N-CNF). The introduction of Se significantly impacts both the composition and microstructure of MnS 0.5 Se 0.5 , including lattice distortion that generates additional defects, optimization of chemical bonds, and a nano-spatially confined design. In situ/ex-situ characterization and density functional theory calculations verified that this MnS 0.5 Se 0.5 @N-CNF alleviates the volume expansion and facilitates the transfer of Na + /electron. As expected, MnS 0.5 Se 0.5 @N-CNF anode demonstrates excellent sodium storage performance, characterized by high initial Coulombic efficiency (90.8%), high-rate capability (370.5 mAh g −1 at 10 A g −1 ) and long durability (over 5000 cycles at 5 A g −1 ). The MnS 0.5 Se 0.5 @N-CNF //NVP@C full cell, assembled with MnS 0.5 Se 0.5 @N-CNF as anode and Na 3 V 2 (PO 4 ) 3 @C as cathode, exhibits a high energy density of 254 Wh kg −1 can be provided. This work presents a novel strategy to optimize the design of anode materials through structural engineering and Se substitution, while also elucidating the underlying reaction mechanisms.
研究领域:
材料科学
·
能源存储
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Chengcheng Qi,Yaqi Kong,Xinyi Qi,Ziyin Yang
Metal single-atom materials are attracting tremendous attention in the field of electrochemical sensing. How to regulate the electrocatalytic activity of metal single-atom materials remains a significant challenge. Here, it was the first time that a dual hetero-atom catalyst comprising adjacent Ni N 4 and Se C 3 sites (Ni 1 Se 1 /NC) was designed for boosting electrochemical glucose sensing. Ni 1 Se 1 /NC material was synthesized through via high-temperature pyrolysis. Experimental and theoretical results demonstrate that Ni single atoms function as the primary active sites for glucose activation. Adjacent Se single atoms, while catalytically inactive, modulate the electronic structure of Ni through electron donation from Ni N 4 to Se C 3 sites. This accelerates electron transfer and enhances glucose molecule adsorption. The synergistic effect of the Ni Se atomic pair significantly boosts electrocatalytic glucose oxidation activity, resulting in a nearly 6-fold increase in glucose detection sensitivity. Unlike dual-atom site systems where both atoms serve as catalytic centers, this study reveals the unique function of the Se site as a non-catalytic modulator. Via electronic effects, Se enhances the catalytic activity of Ni sites without directly participating in the reaction, representing a departure from conventional dual-atom site mechanisms.
研究领域:
电化学传感
·
催化
·
纳米材料
·
电化学
·
单原子催化
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Xiangyang Zhao,Lingling Wang,Yawei Wang,Xingyu Zhang,Rong Fang,Yue Zhou,Rui Guo,Xintong Zhang,Yichun Liu
Kesterite Cu 2 ZnSn(S,Se) 4 (CZTSSe) thin film solar cells are considered a promising new type of film cell, due to their rich elemental reservation and excellent photovoltaic performance. However, the deleterious defects at the heterojunction interface severely hinder charge transport, separation, and extraction, significantly limiting the photovoltaic performance of CZTSSe solar cells. In this study, a simple method involving the incorporation of Cd 2+ and Ag + dual-ion at the heterojunction interface was proposed to reduce interfacial defects. The results showed that Cd 2+ and Ag + dual-ion interface deposition effectively reduced the [2Cu zn + Sn zn ] harmful defects near the heterojunction interface and subsequently reduced the number of recombination centers in the interface. This led to improved carrier recombination at the interface. Meanwhile, the devices achieved a wider depletion width, which was more favorable for carrier collection. Ultimately, the conversion efficiency increased by 32.81 %. This simple interface dual-ion deposition strategy offers a promising strategy for further enhancing the efficiency of CZTSSe cells.
研究领域:
材料科学
·
光伏技术
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Letu Siqin,Wenjing Xin,Ruijian Liu,Hongmei Luan,Lei Wang,Yiming Wang,Shuyu Li,Jingyuan Guo,Yu He,Jiayong Zhang,Bin Yao,Chengjun Zhu
Interfaces quality have always been considered the key factors in the fabrication of efficient Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells, and harmful defects at the interface can significantly reduce the performance of the device. Here, we propose a dual passivation strategy by adding Na to the surface of the absorber layer (CZTSSe) to passivate the CZTSSe/CdS interface and treating the buffer layer (CdS) using ultraviolet (UV) irradiation to passivate the CdS/ZnO interface. Due to the Na doping passivation, the absorber surface conductivity increases while the roughness decreases and detrimental defects that can lead to nonradiative recombination are reduced. The power conversion efficiency (PCE) of the cell is improved by about 1 percentage point by Na passivation. The contributions of open-circuit voltage ( V oc ), short-circuit current density ( J sc ), and fill factor (FF) to the improvement of PCE have been quantified as 50.64%, −5.58%, and 54.94%, indicating that Na doping can significantly boost V oc and FF. UV-ozone passivation reduces residual carbon organics in the CdS buffer layer , weakens carrier recombination, allows for more light absorption , and widens the depletion region , which favors efficient carrier collection. The estimated contribution of V oc , J sc , and FF to the PCE of the device is 8.78%, 119.59%, and −28.37%, respectively, demonstrating that UV-ozone passivation can significantly improve the J sc of the device. The two passivation strategies complement each other's advantages and achieve a synergistic effect . Our prepared champion device exhibits a PCE of 10.69% and remarkable long-term stability.
研究领域:
材料科学
·
光伏技术
·
界面工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Rui Huang,Yinhua Wang,Yixin Pan
Owing to industrialization, the increased generation of electronic waste, and intensified metal ore and coal extraction activities, certain geographical areas are currently confronted with widespread selenium contamination in their groundwater. Consequently, there has been a considerable surge of interest in exploring techniques for selenium removal. In this study, we propose the utilization of single-layer dispersion of Ti 3 CN to facilitate the elimination of Se(Ⅳ). The results of the spectral analysis demonstrated that the removal of Se(Ⅳ) using Ti 3 CN occurs via a combined process of adsorption and reduction reactions. These two substances collaborated to create an inner sphere complex, which facilitated the reduction of Se(Ⅳ) to Se(0), ultimately resulting in the rapid formation of a co-precipitation product. The experimental results show that the adsorption capacity of Ti 3 CN for Se(Ⅳ) was notably sensitive to pH value, showing an adsorption capacity of 871.2 mg/g at pH 2. Furthermore, it was noted that the experimental results conformed well to the quasi-second-order kinetic model, with the Langmuir model effectively representing the adsorption isotherm data of Se(Ⅳ). This indicates that the process of Se(Ⅳ) removal by Ti 3 CN operates through chemical monolayer homogeneous adsorption. Notably, the presence of multiple ions revealed that only a selected few ions were able to impede the elimination of Se(Ⅳ). These findings underscore the potential of Ti 3 CN MXene as an efficient agent for treating selenium-containing wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Haixuan Gao,Chuanhe Ma,Jinhui Zhang,Jinchun Jiang,Ye Chen,Lin Sun,Hailong Wang
In the prior art of CZTSSe solar cells, the traditional cadmium salt (Cd-salt) CdSO4 is widely considered as a common raw material for preparing CdS buffer layers. However, in this study, we systematically demonstrated the phase structure and transmission spectra improvement effect of the other three types of Cd-salts, Cd(NO3)2, CdCl2, and CdAc2, on the CZTSSe/CdS heterojunction (HJT) compared to CdSO4. CZTSSe/CdS HJT prepared by Cd(NO3)2 showed the strongest CdS phonon characteristic peaks at 295.9 and 597.6 cm–1, indicating a pure crystal phase. The transmittance of CdS films prepared by Cd(NO3)2 is 20–35% higher than the other three Cd-salts in the light range of 350–1000 nm, which effectively improved the band gap of the films (2.41 eV) and depressed the photon absorption and scattering. Accordingly, CZTSSe solar cells based on the aforementioned Cd-salts showed that Cd(NO3)2 possessed the best ability to improve the photovoltaic conversion efficiency (PCE), about 5.7% more than the traditional CdSO4 salt. After Sn2+ replaced by Sn4+ in the precursor solution, the PCE of CZTSSe solar cells using Cd(NO3)2 exceeded 10% (Total area = 0.21 cm2, PCE = 10.23%, VOC = 0.485 V, JSC = 31.4 mA/cm2, FF = 67.1%, without MgF2 antireflective layer).
研究领域:
材料科学
·
光伏技术
·
可再生能源
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2023
·
IF 6.8
Chengke Fu,Yichao He,Chengyun Yang,Jieyu He,Luna Sun,Yixin Pan,Liping Deng,Rui Huang,Manli Li,Kaikai Chang
Selenium (Se) as an essential nutrient for human beings at trace concentrations, the allowable concentration for the human is only 40 μg/L. Iron sulfide (FeS) nanoparticles have been applied for excessive of selenium (Se) remediation in surface water and groundwater. In this study, FeS nanoparticles were anchored onto biochar (BC) to reduce agglomeration of FeS and prepared into the composite of FeS-BC by pyrolysis to economically and efficiently remove Se(IV) from simulated wastewater based on the excellent performance of FeS and the low cost of BC. Characterizations presented the uniform anchorage of FeS on the BC surface to prevent agglomeration. The results of batch experiments revealed that the removal of Se(IV) by FeS-BC nanomaterials significantly depended on the pH value, with the maximum removal of ∼174.96 mg/g at pH 3.0. A pseudo-second-order kinetic model well reflected the kinetic removal of Se(IV) in pure Se(IV) solution with different concentration, as well as the coexistence of K + , Ca 2+ , Cl - , and SO 4 2- ions. The presence of K + ions significantly inhibited the removal of Se(IV) with the increase of K + ion concentration compared with the effect of the other three ions. SEM-EDS and XPS analyses indicated that the removal process was achieved through adsorption by surface complexation, and reductive precipitation of Se(IV) into Se 0 with the electron donor of Fe(II) and S(-II) ions. The FeS-BC nanomaterial exhibited an excellent application prospect in the remediation of Se(IV).
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Xin Fan,Shan Gao,Qi Chen,Dayi Zhou,Lijie Chang,Yao Wang,Yuewen Zhang,Le Deng,Hongan Ma,Xiaopeng Jia
In recent years, skutterudite filled with electronegative elements (S, Se, Cl, Br) has attracted the extensive attention of researchers. By doping electron donors (Pb, Ni, or Te, S, Se) at the Co or Sb sites, the electronegative elements can form thermodynamically stable compounds in the intrinsic pores of the skutterudite, substantially expanding the research scope of skutterudite. In this study, S0.05Co4Sb11.3Te0.6Se0.1 skutterudite was synthesized at high pressure and high temperature, with a pressure range of 2.0–3.5 GPa. The phase composition, micro-morphology, and electrical and thermal transport properties were systematically characterized. The micromorphology analysis shows that the introduction of S element and substituting Te and Se at the Sb sites inhibit the grain growth in a suitable high-pressure environment. Substantial differences are observed in the directions of the lattice stripes in the samples, and rich grain boundaries and many lattice distortions and dislocation defects occur. The carrier concentration can be optimized by filling the voids of the skutterudite with a few S atoms, and the thermoelectric properties can be optimized by scattering phonons through resonance scattering and defect scattering. The samples synthesized at a pressure of 3.0 GPa and a temperature of 900 K have a maximum power factor of 23.85 × 10–4 W m–1 K–2 and a maximum zT value of 1.30 at a test temperature of 773 K.
研究领域:
材料科学
·
热电材料
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Xinan Shi,Lijian Huang,Daocheng Pan
In this research, a facile and environmentally friendly solution approach is developed to deposit Cu 2 ZnSn(S,Se) 4 thin films by addition of n -butylammonium butyrate ionic liquid . n -Butylammonium butyrate plays a critical role in solution deposition of Cu 2 ZnSnS 4 precursor thin film. We find that liquid n -butylammonium butyrate can dissolve a number of metal oxides , including Cu 2 O, ZnO, and SnO as well as various metal chlorides , metal nitrates and metal acetates. Smell-free Cu 2 ZnSnS 4 precursor solution is synthesized by dissolving Cu 2 O, ZnO, SnCl 2 and thiourea in an ethanol solution of n -butylammonium butyrate. Thermally degradable n -butylammonium butyrate can be completely removed by a low-temperature sintering process , forming high quality Cu 2 ZnSnS 4 nanoparticle thin film. A power conversion efficiency of 8.79% is obtained by this facile and green solution approach.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Hong-Bo Wang,Yang-Shuo Sun,Fei Ma,Liang Zhou,Hui-Feng Li,Long Zhang,Guan-Jun Chen,Yi-Ku Xu,Yong-Nan Chen,Ke-Wei Xu,Da-Yan Ma
Well-arranged heterogeneous interface is favored to enhance the electrocatalytic activities to utilize the synergistic effects of different crystalline phases. In this work, vertical aligned single crystal Ni 3 Se 2 nanowires (NWs) wrapped by ultra-thin NiSe nanoflakes (NFs) with well-arranged heterogeneous interfaces along axial direction were successfully in situ grown on nickel foam (Ni foam) by a simple one-step hydrothermal method without posttreatment. The growth of Ni 3 Se 2 NWs follows a surface reaction mechanism by which NiSe reacts with reactive Ni · atoms on surface lattice steps of Ni 3 Se 2 nucleuses to grow both along radial and axial directions. The configurations of the products can be tuned from NiSe NFs to the core-shell NWs dominated structures by solely modulating Se molarity in chemical precursors motivated by the accelerated reaction kinetics. The hydrogen evolution reaction (HER) performance was improved with the increase of Se molarity attributing to the increased coverage of high aspect Ni 3 Se 2 /NiSe core-shell NWs arrays, metallic conductive feature of Ni 3 Se 2 skeleton and well-arranged heterogeneous interfaces along the axial direction. The Ni 3 Se 2 /NiSe core-shell NWs with well-arranged heterogeneous interfaces may also be beneficial to other energy or environmental applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Hua Zhang,Wenjuan Fang,Wenran Wang,Nisheng Qian,Xiaohe Ji
The balance between band structure, composition, and defect is essential for improving the optoelectronic properties of ternary and quaternary quantum dots and the corresponding photovoltaic performance. In this work, ascorbic acid (AA) as capping ligand is introduced into the reaction system to prepare green Zn–Cu–In–Se (ZCISe) quantum dots. Results show that the addition of AA can increase the Zn content while decrease the In content, resulting in enlarged band gap, high conduction band energy level, and suppressed charge recombination. When AA/Cu ratio is 1, the quantum dots possess the largest band gap of 1.49 eV and the assembled quantum dot-sensitized solar cells exhibit superior photovoltaic performance with ∼17% increment mainly contributed by the dramatically increased current density. The new record efficiencies of 10.44 and 13.85% are obtained from the ZCISe cells assembled with brass and titanium mesh-based counter electrodes, respectively.
研究领域:
材料科学
·
能源技术
·
光电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）