Nanoscale
·
2021
·Vol. 13
·期 42
·17846-17853
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IF 7.79
Ting Li,Qing Zhang,Xiao Hu Wang,Juan Luo,Li Shen,Hong Chuan Fu,Fei Gu,Nian Bing Li,Hong Qun Luo
Electrochemical water splitting is widely studied in the hope of solving environmental deterioration and energy shortage. The design of inexpensive metal catalysts exhibiting desired catalytic performance and durable stability for efficient oxygen evolution is the pursuit of sustainable and clean energy fields. Herein, a three-dimensional (3D) flower-like NiSe2 primary structure, modified with highly dispersed CuSe2 nanoclusters as the secondary structure, is obtained by regulating the growth trend of the nanosheets. Benefiting from the metallicity of selenides and the formation of a heterogeneous interface, NiSe2@CuSe2/NF shows comparable performance toward the oxygen evolution reaction (OER) in an alkaline environment. Upon regulating the synthesis conditions, the catalyst exhibits its optimal performance with ultralow overpotential for the OER when the Ni/Cu molar ratio is 1 : 0.2 and the hydrothermal temperature and hydrothermal time are 200 °C and 6 h, respectively. It provides a current density of 10 mA cm−2 when a potential of 201 mV is applied without iR compensation. In this work, the hierarchical heterostructures of NiSe2 and CuSe2 are synthesized, which exhibit high electrocatalytic activity towards the oxygen evolution reaction and provides a new possibility for the extensive application of copper-based compounds in advanced energy fields.
研究领域:
材料科学
·
能源化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Chenglong Wu,Jiulin Hu,Jing Tian,Fulu Chu,Zhenguo Yao,Yongjian Zheng,Dongguang Yin,Chilin Li
Mg anode has pronounced advantages in terms of high volumetric capacity, resource abundance, and dendrite-free electrochemical plating, which make rechargeable Mg-based batteries stand out as a representative next-generation energy storage system utilized in the field of large-scale stationary electric grid. However, sluggish Mg2+ diffusion in cathode lattices and facile passivation on the Mg anode hinder the commercialization of Mg batteries. Exploring a highly electroactive cathode prototype with hierarchical nanostructure and compatible electrolyte system with the capability of activating both an anode and a cathode is still a challenge. Here, we propose a POM⊂MOF (NENU-5) core–shell architecture as a hybrid precursor template to achieve the stacking of tailored chalcogenide nanosheets around MoO2-C conductive stakes, which can be employed as conversion–insertion cathodes (Cu1.96S-MoS2-MoO2 and Cu2Se-MoO2) for Mg–Li dual-salt batteries. Li-salt modulation further activates the capacity and rate performance at the cathode side by preferential Li-driven displacement reaction in Cu+ extrusible lattices. The heterogeneous conductive network and conformal dual-doped carbon coating enable a reversible capacity as high as 200 mAh/g with a coulombic efficiency close to 100%. The composite cathode can endure a long-term cycling up to 400 cycles and a high current density up to 2 A/g. The diversity of MOF-based materials infused by functional molecules or clusters would enrich the nanoengineering of electrodes to meet the performance demand for future multivalent batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2021
·Vol. 9
·期 5
·2104630
·
IF 16.806
Xi Chen,Malin Li,Shi-Ping Wang,Chunzhong Wang,Zexiang Shen,Fu-Quan Bai,Fei Du
Selenium-based materials are considered as desirable candidates for potassium-ion and sodium-ion storage. Herein, an in situ fabrication method is developed to prepare an integrated cuprous selenide electrode by means of directly chemical selenization of the copper current collector with commercial selenium powder. Interestingly, only the electrolyte of 1 m potassium hexafluorophosphate dissolved in 1,2-dimethoxyethane with higher highest occupied molecular orbital energy and lower desolvation energy facilitates the formation of polyselenide intermediates and the further selenization of the copper current collector. Benefiting from the unique thin-film-like nanosheet morphology and the robust structural stability of the integrated electrode, the volume change and the loss of selenide species could be effectively restrained. Therefore, high performance is achieved in both potassium-ion batteries (462 mA h g −1 at 2 A g −1 for 300 cycles) and sodium-ion batteries (775 mA h g −1 at 2 A g −1 for 4000 cycles). The facile fabrication strategy paves a new direction for the design and preparation of high-performance electrodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Xinyi Zhong,Jinlin Wang,Litao Han,JinJin Chi,Tong Liu,Dongxing Kou,Wenhui Zhou,Zhengji Zhou,Shengjie Yuan,Yuena Meng,Yafang Qi,Qingbo Meng,Sixin Wu
In addition to open-circuit voltage (V OC ) loss, fill factor (FF) loss is considered another major factor restricting the further optimization of Cu 2 ZnSn(S,Se) 4 (CZTSSe) device efficiency. In this work, a comprehensive investigation into the loss mechanisms of FF has been conducted, and implemented a Li&Ag co-doping approach to enhance FF. The results indicate that the FF loss caused by insufficient carrier extraction is higher than that caused by non-radiative recombination. The carrier extraction capability is significantly influenced by the band alignment of the CdS/CZTSSe interface and has little relationship with the carrier concentration of the absorber. Therefore, although Ag doping reduces the hole concentration and conductivity, it reduces the FF loss caused by carrier extraction due to the improvement of band alignment. Ag doping is also superior to Li in passivating harmful defects, which helps reduce FF losses caused by non-radiative recombination. Correspondingly, Li performs better than Ag in increasing the hole carrier concentration and optimizing band alignment, greatly reducing FF losses caused by insufficient carrier transport. Finally, the Li and Ag co-doping strategy enables a 14.91% efficient kesterite solar cell with the highest reported FF to date of 74.30% through collaborative optimization of carrier extraction and suppression of non-radiative recombination.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
高影响因子
Small
·
2024
·Vol. 20
·期 35
·2401330
·
IF 13
Yingfen Li,Yue Jian,Fang Huang,Nian Zhou,Wanqiu Chai,Juguang Hu,Jun Zhao,Zhenghua Su,Shuo Chen,Guangxing Liang
Cu 2 ZnSn (S,Se) 4 (CZTSSe), a promising absorption material for thin-film solar cells, still falls short of reaching the balance limit efficiency due to the presence of various defects and high defect concentration in the thin film. During the high-temperature selenization process of CZTSSe, the diffusion of various elements and chemical reactions significantly influence defect formation. In this study, a NaOH-Se intermediate layer introduced at the back interface can optimize Cu 2 ZnSnS 4 (CZTS)precursor films and subsequently adjust the Se and alkali metal content to favor grain growth during selenization. Through this back interface engineering, issues such as non-uniform grain arrangement on the surface, voids in bulk regions, and poor contact at the back interface of absorber layers are effectively addressed. This method not only optimizes morphology but also suppresses deep-level defect formation, thereby promoting carrier transport at both interfaces and bulk regions of the absorber layer. Consequently, CZTSSe devices with a NaOH-Se intermediate layer improved fill factor, open-circuit voltage, and efficiency by 13.3%. This work initiates from precursor thin films via back interface engineering to fabricate high-quality absorber layers while advancing the understanding regarding the role played by intermediate layers at the back interface of kesterite solar cells.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Solar RRL
·
2023
·Vol. 7
·期 24
·2300711
·
IF 7.9
Chunkai Wang,Ding Ma,Mengge Li,Yue Liu,Xiaofei Sun,Yuting Sun,Yan Zhu,Zhanhui Ding,Yongfeng Li,Bin Yao
One of the key issues impeding the enhancement of power conversion efficiency (PCE) of Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells is the severe carrier recombination at CZTSSe/MoSe 2 back interface, primarily arising from the reverse electric field formed between CZTSSe and n-type MoSe 2 produced after selenization. To inhibit recombination at back interface, herein, the MoSe 2 layer is converted from n-type to p-type by V doping in site through reaction of V-alloyed Mo (Mo:V) back electrode with Se during selenization, and CZTSSe solar cells with p + -type V-doped MoSe 2 (MoSe 2 :V) interface layer are fabricated. It is found that the PCE of the device rises from 8.34% to 9.63% as back contact changes from soda lime glass (SLG)/Mo/n-MoSe 2 to SLG/Mo:V/p + -MoSe 2 :V. The quantitative analysis demonstrates that the increased PCE predominantly originated from the decreased reverse saturated current density ( J 0 ), followed by the decreased series resistance ( R S ), and lastly by the increased photogenerated current density ( J L ). The influence mechanism of the SLG/Mo:V/MoSe 2 :V back contact on device performance is suggested by studying the properties of Mo:V and MoSe 2 :V films and CZTSSe/MoSe 2 :V heterojunction. This work emphasizes the vital significance of the back surface passivation field induced by p + -MoSe 2 :V/p-CZTSSe heterojunction, which is enlightening for optimizing the back contact in kesterite photovoltaics.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
高影响因子
SOLAR ENERGY
·
2023
·
IF 6.7
Yonggang Zhao,Congyan Xu,Na Yu,Zhineng Zhou,Yufei Chen,Xinghuan Hu,Ying Zhang,Shurong Wang
A mixed dimethyl sulfoxide (DMSO) and 2-methoxy ethanol (MOE) solvent system was developed to prepare high-quality kesterite Cu 2 ZnSn(S, Se) 4 (CZTSSe) film. The precursor films made pure DMSO system show a tube-like microstructure morphology, which can be changed by adding MOE to the solution. The increase of MOE in the precursor solution is a key in the crystalline characteristic of the absorber and connecting performance with thin film solar cells. As V MOE = V DMSO , the CZTSSe layer can achieve good contact with the back electrode and obtain large grains across layers. The addition of MOE solvent effectively improves the fill factor (FF). Specifically, both the fill factor and efficiency are increased from 49.67% and 6.43% to 64.83% and 10.99%, respectively, with the addition of 2 mL of MOE into precursor solution prepared by DMSO.
研究领域:
材料科学
·
能源技术
·
光伏研究
✓ 已验证
产品关联
DOI
高影响因子
BIOMATERIALS
·
2021
·
IF 12.479
Qi Xu,Hao Zhang,Hanghang Liu,Yaobao Han,Weibao Qiu,Zhen Li
Radio-resistance of glioblastoma (GBM) remains a leading cause of radiotherapy failure because of the protective autophagy induced by X-Ray irradiation and tumor cells’ strong capability of repairing damaged DNA . It is of great importance to overcome the radio-resistance for improving the efficacy of radiotherapy. Herein, we report the novel mechanism of core-shell copper selenide coated gold nanoparticles ( [email protected] 2- x Se NPs) inhibiting the protective autophagy and DNA repair of tumor cells to drastically boost the radiotherapy efficacy of glioblastoma. We reveal that the core-shell [email protected] 2- x Se NPs can inhibit the autophagy flux by effectively alkalizing lysosomes . They can increase the SQSTM1/p62 protein levels of tumor cells without influencing their mRNA. We also reveal that [email protected] 2- x Se NPs can increase the ubiquitination of DNA repair protein Rad51, and promote the degradation of Rad51 by proteasomes to prevent the DNA repair. The simultaneous inhibition of protective autophagy and DNA repair significantly suppress the growth of orthotopic GBM by using radiotherapy and our novel [email protected] 2- x Se NPs. Our work provides a new insight and paradigm to significantly improve the efficacy of radiotherapy by rationally designing theranostic nano-agents to simultaneously inhibit protective autophagy and DNA repair of tumor cells.
研究领域:
肿瘤学
·
纳米技术
·
放射生物学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jinzhe Liang,Yanting Yang,Yanni Luo,Lixian Huang,Shulin Zhao
Elevating photothermal conversion efficiency (PCE) is the key to enhance curative efficacy during photothermal therapy. Nevertheless, current functionalized or synthetic methods for preparing photothermal agents with high PCE are too complicated, greatly hindering the development of photothermal therapy. In this study, we developed a tumor-targeting flower-like nanocomposite termed mesoporous platinum nanoparticles@Cu 2- x Se-AS1411 (MPNPs@Cu 2- x Se-AS1411, denoted as MPCSA) with remarkable PCE for high-resolution photoacoustic (PA) imaging guided photothermal/chemodynamic therapy for tumor ablation. We discovered that MPNPs served as carriers for delivering PA contrast agents. Cu 2- x Se nanosheets emerged as promising near-infrared-II (NIR-II) PA imaging and photothermal/chemodynamic therapy agents owing to their strong localized surface plasmon resonance property in the NIR-II region. The amine-modified AS1411 aptamer, which is connected to the surface of the flower-like MPNPs@Cu 2- x Se can target the nucleolar protein on the surface of 4T1 cells, achieving the accumulation of MPCSA at the tumor site in mice. Notably, these MPCSA nano-flowers exhibited an excellent PCE up to 82.33 % under 1064 nm laser irradiation, resulting in highly efficient cancer cell ablation and greatly hindering in vivo tumor growth. This study has paved the way for imaging-guided accurate cancer diagnosis and targeted cancer therapy.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
·
癌症研究
·
诊疗学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）