RSC Advances
·
2013
·Vol. 3
·期 45
·23133-23138
·
IF 2.562
Yang Wang,Yun Xiao,Hangyu Zhou,Wei Chen,Ruikang Tang
A novel versatile system combining chemotherapy and photothermal therapy for cancer cells using CuS NCs is reported. CuS NCs were synthesized by a solid–liquid reaction between Cu2O nanocubes and thiourea. While the hollow nanocage can be used to load anticancer drugs for chemotherapy, the CuS can convert NIR light into heat for photothermal therapy. More importantly, CuS NCs display exceptionally high drug loading capacity of DOX with 500 wt% and release of DOX is pH-controllable, which is a spontaneous process under intracellular conditions. Compared with chemotherapy or photothermal therapy alone, the combination of chemotherapy and phototherapy can significantly improve the therapeutic efficacy. This improvement strategy using multifunctional nanomaterials may be particularly useful in biomedical applications.
研究领域:
肿瘤学
·
纳米医学
·
药物递送
·
转化医学
·
生物材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·Vol. 48
·期 3
·3636-3646
·
IF 4.527
Shunxiang Wang,Songwen Fang,Kexiang Zhang,Yongjin Zou,Zuoan Xiao,Fen Xu,Lixian Sun,Cuili Xiang
A poor electrical conductivity and short cycle life limits the wide application of transition metal oxides in energy storage applications. In this study, yolk-shell structured CuCo 2 S 4 was grown on NiO nanosheets (NiO@CuCo 2 S 4 ) via a hydrothermal method and vulcanization , which combined the synergistic interactions between Ni, Co, and Cu. The effect of varying the amount of the vulcanizing agent (thiourea) on the electrochemical performance of NiO@CuCo 2 S 4 was also investigated. Moreover, the amount of thiourea not only tuned the morphology of the composite, but significantly influenced its electrochemical performance. When the Cu 2+ : Co 2+ : thiourea molar ratio in the precursor solution was 1:2:6, the obtained NiO@CuCo 2 S 4 exhibited the best electrochemical performance of the various systems examined, with a specific capacitance of 1658 F g −1 being achieved at 1 A g −1 . Density functional theory calculations further confirmed the excellent synergistic effect between NiO and CuCo 2 S 4 . In addition, the asymmetric supercapacitor composed of a NiO@CuCo 2 S 4 positive electrode reached an ultrahigh energy density of 73 Wh kg −1 at a power density of 802 W kg −1 , as well as excellent cycling stability (i.e., 91% capacitance retention after 5000 cycles). These results suggest that NiO@CuCo 2 S 4 is a promising candidate for use in energy storage applications.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Jiaying Zhang,Zhendong Yao,Wenzhen Zou,Qiang Shen,Meiqiang Fan,Tingli Ma
Transition trimetallic sulfide NiCoMn–S attracts great attention due to its high specific capacity for hybrid supercapacitors , as well as Ti 3 C 2 is considered essentially as a potential new electrode material with iconic two-dimensional layered structure and excellent conductivity. Herein, NiCoMn–S nanoparticles are composited with two-dimensional layered Ti 3 C 2 via simple one-step hydrothermal method , which is first applied as positive electrode in hybrid supercapacitors (HSCs). A large number of NiCoMn–S nanoparticles distribute on the surface of Ti 3 C 2 and even insert into the Ti 3 C 2 layers, providing abundant electrochemical active sites for redox reaction and enhancing the mechanical stability for composites. Moreover, the NiCoMn–S/Ti 3 C 2 composites show lower charge-transfer resistance than pure NiCoMn–S, illustrating that the two-dimensional layered structure of Ti 3 C 2 improve the conductivity and supply additional electronic channels for ion transportation. The NiCoMn–S/Ti 3 C 2 -3.4% delivers a specific capacity of 347.1 C g −1 at a specific density of 1 A g −1 , which is 28% higher than that of pure NiCoMn–S (270.2 C g −1 at 1 A g −1 ). Finally, a hybrid supercapacitor (HSC) is assembled by using NiCoMn–S/Ti 3 C 2 -3.4% as positive electrode and RGO as negative electrode, realizing a specific capacity of 164.3 C g −1 at 1 A g −1 and high specific energy of 16.2 Wh kg −1 at a specific power of 15 kW kg −1 .
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Liming Jin,Jie Ni,Chao Shen,Fenglai Peng,Qiang Wu,Donghao Ye,Junsheng Zheng,Gaoran Li,Cunman Zhang,Zhoupeng Li,Jim P. Zheng
A metallically conductive TiB 2 is developed to construct multifunctional separator toward improved lithium-sulfur (Li–S) battery performance. Coupled with two-dimensional graphene, the obtained TiB 2 @G separator fulfills a synergistic combination of strong physical and chemical sulfur immobilization as well as a high-efficiency sulfur reutilization, thus establishing a robust barrier against the polysulfide shuttling and enabling a fast and durable sulfur electrochemistry . As a result, cells based on TiB 2 @G separator exhibit a high sulfur utilization with 1350 mA h g −1 capacity at 0.05C, superb rate capability up to 5.0C, and excellent cyclability with a high capacity retention over 85% after 300 cycles at 0.5C. Moreover, significantly mitigated self-discharge and considerably high areal capacity of 5.8 mA h cm −2 can be also achieved, indicating the great promise of this separator design for the development of high-performance Li–S batteries.
研究领域:
电化学
·
能源材料
·
纳米材料科学
·
储能技术
·
电池化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Wenyuan He,Xuejun Zheng,Jinfeng Peng,Qiang Zhang,Dazhao Pei,Xinyang Yan
A facile one-step solid-phase synthesis strategy is developed for synthesizing a binder-free molybdenum disulfide/carbon fibers paper (MoS 2 /CFP) anode. The microstructure, composition, morphology and electrochemical performances were investigated. It is found that the thin MoS 2 layers are well anchored on the interlaced carbon fibers to form MoS 2 /CFP, which has mesoporous structure and large specific surface area of ∼18.8 m 2 g -1 . As a result, the obtained MoS 2 /CFP anode exhibits a reversible capacity of 261 mAh·g −1 with 31.2% loading ratio of MoS 2 . After subtracting the capacity of CFP, the MoS 2 in the composite anode delivers a reversible capacity of 539 mAh·g −1 and shows better cycle stability than commercial MoS 2 after 100 cycles at 100 mA g −1 . The remarkable electrochemical performances could be attributed to the buffer space among carbon fibers for the volume changes of MoS 2 as well as the highly conductive carbon fibers network, suggesting that the MoS 2 /CFP is a promising binder-free anode for lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Gang Peng,Xiayin Yao,Hongli Wan,Bingxin Huang,Jingyun Yin,Fei Ding,Xiaoxiong Xu
An insightful study on the fundamental lithium storage behavior of all-solid-state lithium battery with a structure of LiNi 0.8 Co 0.15 Al 0.05 O 2 (NCA)/Li 10 GeP 2 S 12 /Li-In is carried out in this work. The relationship between electrochemical performances and particle size, surface impurities and defects of the NCA positive material is systematically investigated. It is found that a ball-milling technique can decrease the particle size and remove surface impurities of the NCA cathode while also give rise to surface defects which could be recovered by a post-annealing process. The results indicate that the interfacial resistance between the NCA and Li 10 GeP 2 S 12 is obviously decreased during the ball-milling followed by a post-annealing. Consequently, the discharge capacity of NCA in the NCA/Li 10 GeP 2 S 12 /Li-In solid-state battery is significantly enhanced, which exhibits a discharge capacity of 146 mAh g −1 at 25 °C.
研究领域:
材料科学
·
电化学
·
能源存储
·
固态离子学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Dexi Liu,Shichang Xu,Yanmeng Cai,Yue Wang,Jiaqi Guo,Youlin Li
The conventional separation technologies, like chemical precipitation and adsorption processes, cannot quickly and selectively separate and recycle heavy metal ions from waste. Due to its rich sulfur content and excellent electrical conductivity, vanadium disulfide is a potential material for effectively removing lead from wastewater. The vanadium disulfide material with selective adsorption ability was introduced into CDI technology to construct a coupling technology with both advantages. The N -doped modified ZIF@vanadium disulfide (ZAC@VS 2 ) composites were successfully synthesized by hydrothermal method. Electrosorption experiments show that ZAC@VS 2 material presents the remarkable saturated adsorption capacity to lead(II) ions (239.52 mg/g) in the 500 mg/L PbCl 2 solution. In the triplex blend system (Fe 3+ /Pb 2+ /Na + ) with each solute density of 100 mg/L, the saturated adsorption efficiency of 85.4% to Pb 2+ can still be maintained. In addition, compared with the Langmuir(R 2 =0.873) adsorption isotherm model, the Freundlich model (R 2 =0.922) can be better used to fit the adsorption process, which proves that the adsorption process is multilayered and heterogeneous. XPS tests and competitive adsorption experiments show that the electric double layer (EDL) and complexation together promote the selective adsorption of heavy metal ions by ZAC@VS 2 . ZAC@VS 2 composite electrode shows excellent performance in the removal of lead ions in battery waste liquid, indicating the potential of introducing ZAC@VS 2 into CDI to remove lead ions.
研究领域:
环境科学
·
材料科学
·
水处理技术
·
重金属污染控制
·
电化学工程
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Naseem Akhtar,Hongyuan Shao,Fei Ai,Yuepeng Guan,Qifan Peng,Hao Zhang,Weikun Wang,Anbang Wang,Bingyin Jiang,Yaqin Huang
Lithium-sulfur (Li-S) batteries with high specific capacity are expected to be a new generation of energy storage devices. However, the shuttle effect of lithium polysulfide makes it difficult to commercialize stable Li-S batteries. In this work, we designed a gelatin-polyethylenimine composite (GPC) as functional binder for Li-S batteries to improve the stability of electrode during discharge-charge process. GPC binder combines the dispersion and adhesion ability of gelatin, which keeps cathode homogeneous and stable during electrochemical reaction , and adsorption capability of PEI for polysulfide , which suppresses the “shuttling effect”. The result shows that GPC used as a binder remarkably enhanced cyclic performance of Li-S battery with good capacity retention of about 100% at current density of 1C (sulfur loading 1.5 mg cm −2 ) after 100 cycles. We believe that GPC would be a promising binder for highly stable Li-S batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
纳米复合材料
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2016
·
IF 2.822
Xinhe Zhang,Bo Jin,Linlin Li,Tuo Cheng,Huanhuan Wang,Peiming Xin,Xingyou Lang,Chuncheng Yang,Wang Gao,Yongfu Zhu,Qing Jiang
Non-graphitizable carbon (NGC) has been obtained by carbonizing tubular polypyrrole (T-PPy) synthesized through a self-degraded template method . K-NGC/S composite has been prepared by mixing S with K-NGC via melt-diffusion method where NGC has been activated by potassium hydroxide (denoted as K-NGC) and is used as a conductive additive. The as-prepared K-NGC/S composite shows good specific discharge capacity and rate capability with an initial specific discharge capacity of 1121.9 mAh g − 1 and a specific discharge capacity of 729.7 mAh g − 1 after 50 cycles at a current density of 335 mA g − 1 , which is better than pure S. This improvement in the specific discharge capacity and the rate capability of the cell with K-NGC/S composite as a cathode material is realized by the existence of K-NGC, which can offers a superb conductive environment for S, effectively encapsulate S, restrain the outward diffusion of polysulfides , buffer volume change upon cycling and reduce the dissolution of lithium polysulfides into the electrolyte. The good electrochemical performance of K-NGC/S composite would make it become a promising cathode material for lithium-sulfur batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2016
·
IF 2.265
Yimin Wu,Ilia Korolkov,Xvsheng Qiao,Xianghua Zhang,Jun Wan,Xianping Fan
A rapid injection approach is used to synthesize the copper selenide nanoparticles and two-dimensional single crystal nanoplates . This technique excludes the use of toxic or expensive materials, increasing the availability of two-dimensional binary chalcogenide semiconductors. The structure of the nanocrystals has been studied and the possible formation mechanism of the nanoplates has been proposed. The optical absorption showed that the nanoplates demonstrated wide and tuneable absorption band in the visible and near infrared region . These nanoplates could be interesting for converting solar energy and for nanophotonic devices operating in the near infrared .
研究领域:
材料科学
·
纳米科技
·
半导体材料
·
光电子学
·
能源材料
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 117
·96862-96869
·
IF 3.84
Zhijie Gong,Qixing Wu,Fang Wang,Xu Li,Xianping Fan,Hui Yang,Zhongkuan Luo
Increasing the sulfur loading in the cathode of a lithium–sulfur battery is an important way to improve its capacity for practical applications. To achieve this, the present work proposes using PEDOT-PSS to encapsulate sulfur/carbon black (S/BP) by a facile solution mixing method and the formed composite is then coated on a porous carbon paper. It is believed that the formation of a core/shell structure in the PEDOT@S/BP composite can promote the electron transport and effectively impede the diffusion of polysulfides, and the porous carbon paper is able to retain the electrolyte containing the dissolved polysulfides in the cathode and alleviate the adverse effect of sulfur volumetric expansion. Due to such advantages, the proposed cathode, with a high sulfur loading of 3 mg cm−2, can yield a high reversible capacity of 1041 mA h g−1 and an excellent cycle stability with a capacity retention of 868 mA h g−1 after 100 cycles and an average coulombic efficiency of 99.4%.
研究领域:
电化学
·
能源材料
·
纳米复合材料
·
电池技术
·
功能高分子材料
✓ 已验证
DOI
高影响因子
Advanced Electronic Materials
·
2021
·Vol. 7
·期 11
·2100548
·
IF 7.295
Yuying Yang,Alei Li,Mengmeng Wei,Youpin Gong,Wei Qin
The understanding of interlayer couplings should be paid much more attention owing to their importance in 2D materials with different layers. Here, through changing the number of layers, the tunability of interlayer coupling by external magnetic field in 2D material based field effect transistors is studied. External magnetic field can increase triplet electron-hole (e-h) pairs to promote interlayer coupling, where larger source-drain current is induced. Moreover, increasing the gate voltage or source-drain voltage, dipole–dipole interaction among the layers will be enhanced to weaken the tunability of source-drain current by magnetic field. This result reveals the magnetic field dependence of interlayer couplings in 2D materials and provides a guidance to develop new functional 2D material devices.
研究领域:
凝聚态物理
·
二维材料科学
·
纳米电子学
·
半导体器件物理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）