PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2016
·Vol. 18
·期 46
·31821-31827
·
IF 4.449
Dan Feng,Zhen-Hua Ge,Di Wu,Yue-Xing Chen,Tingting Wu,Ju Li,Jiaqing He
We present in this manuscript that enhanced thermoelectric performance can be achieved in polycrystalline SnSe prepared by hydrothermal reaction and spark plasma sintering (SPS). X-ray diffraction (XRD) patterns revealed strong orientation along the [l 0 0] direction in bulk samples, which was further confirmed by microstructural observation through transmission electron microscopy (TEM) and field emission scanning electron microscopy (FESEM). It was noticed that the texturing degree of bulk samples could be controlled by sintering temperature during the SPS process. The best electrical transport properties were found in the sample which sintered at 450 °C in the direction vertical to the pressing direction, where the highest texturing degree and mass density were achieved. Coupled with the relatively low thermal conductivity, an average ZT of ∼ 0.38, the highest ever reported in pristine polycrystalline SnSe was obtained. This work set up a forceful example that a texture-control approach can be utilized to enhance the thermoelectric performance effectively.
研究领域:
材料科学
·
热电学
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Feng Li,Xiaoqing Cai,Guokeng Liu,Haihua Xu,Wenwen Chen
Flexible strain sensors have enormous potential in wearable devices, robots, and health monitoring equipment. However, the poor stretchability of strain sensors based on semiconductors and the low sensitivity of resistance change-based hydrogel strain sensors hinders the comprehensive application. Herein, a flexible piezoionic SnSe-hydrogel composite with an optimized structure and improved performance is designed. The piezoionic output rises nonlinearly as the applied force increases, with the piezoionic coefficient up to 1780 nV Pa −1 and −7.21 nA Pa −1 . The composite can realize the continuous positioning in 1D space based on the piezoionic effect. It also demonstrates self-powered characteristics, an ultrafast response speed of 6–8 ms, and a high gauge factor of 95.89. The sensor is exemplified to monitor fist clenching and finger bending, which has the potential to discriminate different joint movements. Meanwhile, the device can light up a light–emitting diode under pressure and bending. The as-prepared piezoionic SnSe-hydrogel device, having both high stretchability and sensitivity, may shed light on developing high-performance flexible strain sensors and generators.
研究领域:
材料科学
·
纳米技术
·
电子学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Mingshan Wang,Anmin Peng,Hao Xu,Zhenliang Yang,Lei Zhang,Jun Zhang,Hua Yang,Junchen Chen,Yun Huang,Xing Li
Amorphous structure materials have isotropic characteristics, which provides open active diffusion channels to facilitate the sodium ion diffusion and transport. In this work, amorphous SnSe quantum dots (~2 nm) anchoring on the nitrogen doped graphene (a-SnSe/rGO) are rational designed by facile one-pot solvothermal synthesis . The amorphous SnSe structure largely suppresses the volume change comes from the tin alloying reaction process, further decreases the particle pulverization. Strong Sn–C, Sn–O–C, and Se–C chemical bonds form between a-SnSe and graphene, guaranteeing rapid electrical transport channels during the sodiation/de-sodiation process. As a result, it presents superior electrochemical reversibility of 397 mA h g −1 at 1 A g −1 after 1400 cycles with 0.014% capacity fading per cycle as sodium ion battery anode. The excellent rate performance and the high proportion of pseudocapacitance contribution for a-SnSe/rGO also make it very suitable for the anode materials for sodium ion capacitor. It exhibits high energy density of 58 Wh k g −1 after 5000 cycles at 1 Ag -1 in optimized a-SnSe/rGO||AC sodium ion capacitor. The strategy of fabrication of amorphous nanostructure material provides brand new thoughts for development and application of metal chalcogenide in energy storage devices.
研究领域:
材料科学
·
电化学储能
·
纳米材料
·
能源存储与转换
·
固态化学
·
先进电池技术
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Ye Liu,Kunting Lei,Shaoxiong Liu,Rui Yin,Minghai Zhao,Zhifeng Huang,Hai Hu,Li Liu
In this paper, a novel selenium-doped carbon nanosheet-decorated FeSe x -SnSe/C nanofibers (FeSnSe/SCNFs) composites have been prepared by electrostatic spinning. The unique morphology and structure endow the material with good electrochemical properties. The composite designated as FeSnSe/SCNFs-1, which has a molar ratio of 2:1 between Fe and Sn, performs best electrochemically. FeSnSe/SCNFs-1 anodes show a high reversible capacity of 816.1 mAh g −1 at 100 mA g −1 in lithium-ion batteries, and maintain a capacity of 414.8 mAh g −1 at 5000 mA g −1 . After 800 cycles at 1000 mA g −1 , it exhibits a capacity of 551.8 mAh g −1 , and after 100 cycles in potassium ion batteries at 100 mA g −1 , the capacity is 316.3 mAh g −1 with a retention rate of 90.5 % compared to the second cycle's capacity. This paper offers a novel approach to enhancing metal selenides' anode material performance for lithium/potassium ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·Vol. 20
·期 32
·2312003
·
IF 13
Mohammad Nisar,Adeel Abbas,Junze Zhang,Fu Li,Zhuanghao Zheng,Guangxing Liang,Ping Fan,Yue-Xing Chen
Enhancing the thermoelectric performance of n-type polycrystalline SnSe is essential, addressing challenges posed by elevated thermal conductivity and compromised power factor inherent in its intrinsic p-type characteristics. This investigation utilized solid-state reactions and spark plasma sintering techniques for the synthesis of n-type SnSe. A significant improvement in the figure of merit (ZT) is achieved through strategic reduction in Se concentration and optimization of crystal orientation. The co-doping with Br and Ge further improves the material; Br amplifies carrier concentration, enhancing electrical conductivity, while Ge introduces effective phonon scattering centers. In the Br/Ge co-doped SnSe sample, thermal conductivity dropped to 0.38 Wm⁻¹K⁻¹, yielding a remarkable power factor of 662 µW mK − 2 at 773 K, culminating in a ZT of 1.34. This signifies a noteworthy 605% improvement over the pristine sample, underscoring the pivotal role of Ge doping in enhancing n-type material thermoelectric properties. The enhancement is attributed to Br doping introducing additional electronic states near the valence band, and Ge doping modifying the band structure, fostering resonant states near the conduction band. The Br/Ge co-doping further transforms the band structure, influencing electrical conductivity, Seebeck coefficient, and thermal conductivity, advancing the understanding and application of n-type SnSe materials for superior thermoelectric performance.
研究领域:
材料科学
·
热电材料
·
固体物理
·
凝聚态物理
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Rong Hua,Hongbao Li,Jun Zheng,Rui Wang,Quanwei Ma,Tengfei Zhou,Longhai Zhang,Hongwei Kang,Chaofeng Zhang,Yang Zheng
Sodium ion batteries (SIBs) have been considered as a promising candidate to supersede lithium ion batteries , however, the lack of suitable electrode materials for efficient Na-storage still hinders its practical use. Hence, this work reports a general and effective way to in-situ construction of heterostructured SnSe/SnTe nanodots encapsulated in nitrogen-doped mesoporous carbon matrix (SnSe/SnTe@N-CNFs). In such unique architecture, the porous N-CNFs matrix cannot only provide high electronic/ion conductivity but also alleviate the volume change of SnSe and SnTe, leading to rapid kinetics and robust structure, whereas the ultrasmall SnSe/SnTe heterostructure with built-in interfacial driving force can promote charge transfer kinetics. Meanwhile, the abundant defective sites induced from high-level N-doping is beneficial to Na + storage. Besides, the formed Sn–C, Se–C, and Te–C bonds can improve the interfacial interaction between SnSe/SnTe and N-CNFs, thus enhancing electronic conductivity , suppressing the aggregation and detachment of active components, and ensuring rapid kinetics and structural integrity. When evaluated as an anode for SIBs, the as-prepared SnSe/SnTe@N-CNFs exhibits high reversible capacity, remarkable cycling stability, and superior rate capability. This work can offer an efficient and universal strategy for designing advanced anode materials with exceptional performance.
研究领域:
材料科学
·
能源存储
·
纳米技术
·
电化学
✓ 已验证
DOI
高影响因子
ACS Nano
·
2022
·
IF 18.027
Yaru Gong,Shihua Zhang,Yunxiang Hou,Shuang Li,Chong Wang,Wenjie Xiong,Qingtang Zhang,Xuefei Miao,Jizi Liu,Yang Cao,Di Li,Guang Chen,Guodong Tang
SnSe single crystals have gained great interest due to their excellent thermoelectric performance. However, polycrystalline SnSe is greatly desired due to facile processing, machinability, and scale-up application. Here, we report an outstanding high average ZT of 0.88 as well as a high peak ZT of 1.92 in solution-processed SnSe nanoplates. Nanosized boundaries formed by nanoplates and lattice strain created by lattice dislocations and stacking faults effectively scatter heat-carrying phonons, resulting in an ultralow lattice thermal conductivity of 0.19 W m–1 K–1 at 873 K. Ultraviolet photoelectron spectroscopy reveals that Ge and In incorporation produces an enhanced density of states in the electronic structure of SnSe, resulting in a large Seebeck coefficient. Ge and In codoping not only optimizes the Seebeck coefficient but also substantially increases the carrier concentration and electrical conductivity, helping to maintain a high power factor over a wide temperature range. Benefiting from an enhanced power factor and markedly reduced lattice thermal conductivity, high average ZT and peak ZT are achieved in Ge- and In-codoped SnSe nanoplates. This work achieves an ultrahigh average ZT of 0.88 in polycrystalline SnSe by adopting nontoxic element doping, potentially expanding its usefulness for various thermoelectric generator applications.
研究领域:
材料科学
·
热电学
·
纳米材料
·
能量转换
✓ 已验证
DOI
高影响因子
Small
·
2025
·Vol. 21
·期 21
·2502827
·
IF 12.1
Pei Cai,Xiaotong Yu,Zhijun Wang,Meng Cao,Xinxin Yang,Yusong Du,Jing-Tai Zhao,Juanjuan Xing,Jiye Zhang,Kai Guo
The IV-VI compound SnSe is an environmentally friendly and high-performance thermoelectric material with intrinsically low lattice thermal conductivity. Recent research efforts have focused on enhancing carrier concentration and effective mass to improve power factors, thereby achieving superior thermoelectric performance as reflected in the figure of merit ZT . In context of the anisotropic crystal structure of SnSe, this study utilized a hydrothermal method to synthesize Rb-doped SnSe nanosheets. Rb acts as an acceptor dopant, increasing the hole concentration to 2.0 × 10 19 cm −3 and promoting second valence band participation in transport at room temperature, significantly elevating the ZT value of polycrystalline SnSe to 1.41 at 773 K. Furthermore, texture engineering was implemented through a secondary sintering process. This approach facilitates the organized stacking of grains with highly preferred orientations, resulting in a notable improvement of hole mobility perpendicular to the pressure direction to further increase the power factor. By synergistically combining carrier concentration optimization with texture engineering strategies, an exceptional ZT value of 1.74 at 773 K was achieved in polycrystalline SnSe. This work presents a cost-effective, straightforward, and low-temperature synthesis route for the large-scale production of high-performance SnSe thermoelectric materials, offering significant potential for practical applications in energy harvesting and conversion.
研究领域:
材料科学
·
热电学
·
纳米材料
·
能量转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2023
·Vol. 39
·期 4
·690-696
·
IF 3.1
Xu Pengfei,Hua Yezhen,Jin Kangpeng,Xu Biao
Tin selenide(SnSe) material exhibits very excellent thermoelectric properties in both p- and n-type single crystals, benefiting from advantageous electronic structure and ultra-low lattice thermal conductivity. However, poor mechanical properties and time-consuming production limit its practical application, and polycrystalline SnSe has attracted great attention in recent years. Herein, the SnSe microplates are prepared by a facile solvothermal method and compacted by spark plasma sintering (SPS). With enhanced electrical conductivity( σ ) and optimized Seebeck coefficient( S ) benefited from the Sn vacancies and increased density of states effective mass by the incorporating of heavy rare earth element Gd, an enhanced power factor(PF) value of about 0.86 mW/(m·K 2 ) is realized in the p-type polycrystalline Sn 0.985 Gd 0.015 Se sample. Combined with the medium total thermal conductivity k tot and lattice thermal conductivity k lat of 0.7 and 0.56 W/(m·K), respectively, an enhanced peak dimensionless figure of merit( ZT ) of ca. 1.1 was achieved at 873 K along vertical to the SPS pressing direction. The average ZT was also improved as compared to that of the pristine SnSe sample.
研究领域:
材料科学
·
热电学
·
固体物理
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Shanshan Wang,Xu Hun,Xiliang Luo
The continued expansion of the fields of photoelectrochemical (PEC) aptasensor has guided the development of photoactive materials that can generate electron-photo pairs to emerge photocurrent. However, only such an improvement has an insatiable appetite for the application of molecular level for PEC aptasensor due to the limited quantity of the bioprobes immobilized on the working electrode. Here, we successfully synthetized SnSe/graphene (SnSe/GR) nanohybrids as a photoactive material with a strong photocurrent signal. The constructed bioprobe, DNA/gold nanoparticles/glutathione disulfide (DNA/AuNPs/GSSG), decreased photocurrent effectively. GSSG, an electron acceptor, was designed as a quencher in the bioprobe to overcome a part of shortcomings of DNA/AuNPs in a way. This was owing to the resonance energy transfer (RET) between AuNPs and SnSe/GR, and GSSG to accept photoelectrons, so that the photocurrent response was obviously decreased comparing to the PEC response of SnSe/GR/CPE. Based on this, probe/SnSe/GR/CPE was built as a signal-on PEC aptasensor to detect endocrine-disrupting chemicals using bisphenol A as model. This signal-on PEC aptasensor showed a linear response in the range of 0.01–7 μM and a limit of detection of 3 nM for bisphenol A. And this method presented a promising prospect for sensitive and accurate analysis of other biological molecules between aptamers and corresponding targets at low levels.
研究领域:
分析化学
·
环境科学
·
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Xin Wu,Xingyu Xiong,Bin Yuan,Jun Liu,Renzong Hu
A good cycling stability is a prerequisite for the application of metal-based materials in lithium-ion batteries (LIBs). However, an abnormal increase in capacity is often observed, which has rarely been focused on in many studies. In our SnSe-Mo-C composite anode, a high reversible capacity of 737.4 mAh g −1 remained after 5000 cycles at 5 A g −1 between 0.01 and 3.0 V versus Li/Li + . However, a continuous capacity increase occurred in the initial cycles, with 1086.9 mAh g −1 after 1000 cycles and 1216.9 mAh g −1 after 1500 cycles, respectively. Further studies revealed that the electrolyte decomposed at high potentials (2.5–3.0 V) and provided additional capacities. The cut-off voltage and electrolyte filling were controlled, which eliminated the impact of electrolyte decomposition, prevented rapid capacity decay, and provided a stable cycling performance for SnSe-Mo-C anodes in LIBs. This work shows that the composite anode is promising for lithium storage and the findings provide new insights into understanding and controlling the phenomenon of capacity increase with cycling in metal-based anode materials.
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 THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Zi-Chen Wang,Xiao-Di Jiang,Yu-Xian Duan,Xu Wang,Zhen-Hua Ge,Jin-Ming Cai,Xiao-Ming Cai,Hong-Lin Tan
Tin selenide exhibits outstanding thermoelectric properties. Among its various forms, multicrystalline SnSe stands out as a more practical choice compared to single-crystal SnSe, owing to its straightforward chemical synthesis process, enhanced processability, and scalability. Herein, we synthesized p-type polycrystalline Sn 1−x Ag X Se bulk materials (x = 0, 0.01, 0.015, 0.02, 0.025, 0.03) using a simple hydrothermal and hot pressing method. Characterization methods such as XRD , Raman and XPS were used to demonstrate the successful doping of Ag + into the SnSe matrix. When the doping concentration reached Sn 0.98 Ag 0.02 Se (x = 0.02), Ag + reached the optimal concentration in the SnSe matrix, causing significant lattice distortion which increased phonon scattering and lowered the thermal conductivity , resulting in Sn 0.98 Ag 0.02 Se achieving ZT max = 1.14. However, when the doping concentration exceeded Sn 0.98 Ag 0.02 Se (x > 0.02), excess silver ions precipitated, partially acting as charge carriers, leading to a significant increase in electrical conductivity , resulting in Sn 0.97 Ag 0.03 Se having an electrical conductivity of 6860 s/m at 773 K. Compared to the pure phase, the electrical conductivity of Sn 0.97 Ag 0.03 Se increased by 259 %, and the ZT value of Sn 0.98 Ag 0.02 Se increased by 178%. This work demonstrates that Ag + is an effective p-type dopant in the SnSe system and indicates that high ZT values in SnSe can be achieved through a simple, low-cost, and environmentally friendly method.
研究领域:
材料科学
·
能源材料
·
物理化学
✓ 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）