JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Ruili Zhang,Tian Fang,Liping Ni,Yaping Zhu,Yuhua Shen,Anjian Xie,Li Lao
So far, the high theoretical specific capacity metal oxide is considered as a promising anode material for lithium-ion batteries (LIBs). Unfortunately, the intrinsic poor conductivity and structural stability of metal oxide, the huge volume expansion during the cycling cause serious capacity fading and unstable cycle. Here, the three-dimensional (3D) ordered inverse opal (IO) heterojunction structure of SnO 2 /Bi 2 O 3 on commercial nickel foam (NF) were fabricated. When used as a binder-free anode material for LIBs, the initial discharge specific capacity and charge specific capacity of the IOs electrode were 1229 mA h g −1 and 1098 mA h g −1 . The SnO 2 /Bi 2 O 3 /NF IOs exhibited excellent electrochemical activity and delivered a discharge capacity about 493 mA h g −1 after 500 cycles at the current density of 1000 mA g −1 , the Coulomb efficiency (CE) had been maintained at around 100%, which was much more than the control groups of SnO 2 /NF IOs (247 mA h g −1 ) and Bi 2 O 3 /NF IOs (124 mA h g −1 ). Furthermore, the prepared was successfully assembled with commercial LiFePO 4 to a full cell that displayed stable capacity about 101.2 mA h g −1 at the current density of 100 mA g −1 after 100 cycles. The excellent performance of SnO 2 /Bi 2 O 3 /NF IOs is due to that the 3D interconnected macroporous and mesoporous structures can shorten the transmission path of ions/electrons and buffer volume expansion. In addition, the heterojunction structure with obvious lattice defects can effectively promote the contact between electrode material and electrolyte. The strategy in this study lights on the illuminating design of 3D inverse opal heterostructure binder-free anode, and the obtained product has a great potential as the anode material applied in next-generation LIBs.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Qiang Bi,Yifei Sun,Bo Yang,Yilin Zhao,Zekun Zhang,Juanqin Xue
Electrochemical advanced oxidation technology produces hydroxyl radicals and has no secondary pollution, making it one of the most promising technologies for treating organic pollutants in industrial wastewater. Nevertheless, low energy efficiency and short lifetime are the key issues hindering the widespread application of electrodes. In this study, TiC nanoparticles were uniformly dispersed in the deposition solution, and the Ti/Sb-SnO 2 electrode was prepared by sol electrodeposition , after calcination , a porous double-layer structure was formed, which improved the catalytic performance and effectively delayed the penetration of industrial wastewater into the electrode. Compared with the Ti/Sb-SnO 2 electrode, the electrode life is increased by nearly 6 times, the phenol removal rate reaches 90.64 % (2000 mA/cm 2 , 1 mol/L H 2 SO 4 ), the oxygen evolution potential of 2.13 V, a current density of 0.096 A/cm 2 , a charge transfer resistance of 2.245 Ω. The results show that the porous structure is conducive to providing a larger specific surface area and contact area for the reaction, maximizing the utilization of catalytic active sites, shortens the mass transfer distance between the hydroxyl radicals and pollutants, increases the degradation rate, reduces the corrosion rate of the electrode materials, and improves electrode stability. The unique double-layer structure is obviously different from traditional electrodes, adding a layer of protective barrier, which provides a new idea for prolonging the life of electrodes. The electrode prepared in this study has a simple process, a greatly improved lifespan and an excellent energy utilization rate, which is suitable for industrial application.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Kelin Hu,Jing Zhang,Yu He,Rujing Yan,Ji Li
In this work, a 1D/2D two-phase structure of ZnO single-crystal nanosheets/ZnO–SnO 2 nanorods was constructed, and the hydrogen gas sensing properties including selectivity have been enhanced by this low-cost way without noble metal doping. It was proved that hydrogenation effect on ZnO (0001) single crystal facets was the key to forming the low resistance surface in hydrogen gas, leading significantly enhancement in response and selectivity. The response (R a /R g ) to 200 ppm hydrogen gas exceeded 400 at a low operating temperature of 150 °C, response/recovery time in 100 ppm H 2 was only 30 s/8 s. The sensor also has good selectivity for hydrogen detection. The enhancement in gas sensing properties due to dual mechanism of the hydrogenated low-resistance surface and the resistance modulation of ZnO/SnO 2 heterojunctions, which proposed in this paper.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Tian Qin,Zihao Wang,Xiaojun Ding,Shuqi Fu,Na Zhan,Wentao Lu,Zijian Li,Zihao Huang,Mingyang Li,Jiansheng Liu,Fei Gao,Weiping Zhou,Zhenzhi Cheng,Guangsheng Luo
Li 7 P 3 S 11 -based all-solid-state lithium metal batteries (ASSLMBs) have received a lot of attention because of their potential for high energy density . However, the poor interfacial stability between Li 7 P 3 S 11 electrolyte and lithium metal anode hinders its application in ASSLMBs. Here, the Li-SnO 2 composite anode (LSO) was designed by treating the lithium metal with SnO 2 to produce an interface composed of Li 22 Sn 5 and Li 2 O phases. The rapid lithium ion diffusion coefficient of Li 22 Sn 5 alloy accelerates the migration of lithium ions at the interface, while the favorable lithiophilicity of Li 2 O induces the uniform deposition of lithium ions, which hinders the growth of lithium dendrites . Therefore, the symmetrical battery using an LSO anode showed a high critical current density (CCD) of 2.5 mA cm −2 at room temperature and a stable cycle of 350 h at room temperature at 0.2 mA cm −2 (0.2 mAh cm −2 ). In addition, the improved all-solid-state lithium battery also showed an ultra-stable cycle, and the NCM622/LPS/10LSO battery still maintained 78.6 % of its original capacity after 250 cycles at 0.5C. The surface treatment method of the LSO composite anode enables it to produce ASSLMB with excellent electrochemical performance .
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2025
·
IF 2.9
Wang Yao,Zijin Qiao,Zhirui Chen,Jiaqi Wang,Cheng Mu
Solution-processed planar SnO2 electron transport layers (ETLs) fabricated via sol–gel methods offer promising scalability for manufacturing perovskite solar cells (PSCs). However, inherently, interfacial defects at both the SnO2 surface and the perovskite buried surface severely degrade device performance. Interface engineering of SnO2 ETLs using molecular modifiers presents a promising pathway toward high-performance PSCs. In this work, we propose a dual-functional interface engineering strategy employing aminomethylphosphonic acid (AMPA), an amphiphilic molecule featuring complementary –NH2 and –PO3H2 functional groups, to simultaneously regulate charge transport dynamics and crystallization kinetics. The phosphonic acid group is firmly bound to the surface of SnO2, which effectively suppresses the surface carrier trap and leakage current and makes the surface potential uniform. At the same time, amino groups affect the growth of perovskite films, resulting in higher crystallinity, phase purity, and fewer defects. In addition, open-circuit photovoltage attenuation analysis (OCVD) tests show that the ion aggregation phenomenon of the device is weakened and ion migration is inhibited. TPC indicates a shortened recovery time constant, which may be due to reduced band bending at the interface, resulting in increased mobility of electron injection energy barriers. As a result, the PCE increased from 18.95 to 20.47% while exhibiting excellent stability.
研究领域:
材料科学
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可再生能源
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纳米技术
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固态物理
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化学工程
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Mei Chen,Junjian Zheng,Ruobin Dai,Zhichao Wu,Zhiwei Wang
A selective electrocatalytic ceramic membrane filtration (ECMF) system was developed using molecular imprinting (MI) TiO 2 @SnO 2 -Sb (MI-TiO 2 @SnO 2 -Sb) anode for selectively eliminating 2,4-dichlorophenoxyacetic acid (2,4-D). The introduction of MI sites enhanced the removal of 2,4-D compared to the control. At a charging voltage of 3 V under flow-by mode, the 2,4-D removal rate of MI-TiO 2 @SnO 2 -Sb ECMF system was 1.91 times that of the control (without MI), attributed to the specific recognition sites (leading to selectivity) and the enhanced reactive oxygen species production in the presence of MI sites. In the coexistence of interferent phenoxyacetic acid herbicides, MI-TiO 2 @SnO 2 -Sb ECMF system also showed higher selective coefficient than the control (without MI). More importantly, flow-through mode could enhance the selectivity since the membrane filtration enhanced the mass transfer of target micropollutant towards MI sites. The imparted selectivity was mainly attributed to the size matching and special interaction between the target molecules and imprinted cavities.
研究领域:
环境工程
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水处理
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电化学
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膜科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 22
·2300128
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IF 19
Meizi Wu,Yuwei Duan,Lu Yang,Peng You,Zhijun Li,Jungang Wang,Hui Zhou,Shaomin Yang,Dongfang Xu,Hong Zou,Zhike Liu
The improvement of power conversion efficiency (PCE) and stability of the perovskite solar cell (PSC) is hindered by carrier recombination originating from the defects at the buried interface of the PSC. It is crucial to suppress the nonradiative recombination and facilitate carrier transfer in PSC via interface engineering. Herein, P-biguanylbenzoic acid hydrochloride (PBGH) is developed to modify the tin oxide (SnO 2 )/perovskite interface. The effects of PBGH on carrier transportation, perovskite growth, defect passivation, and PSC performance are systematically investigated. On the one hand, the PBGH can effectively passivate the trap states of Sn dangling bonds and O vacancies on the SnO 2 surface via Lewis acid/base coordination, which is conducive to improving the conductivity of SnO 2 film and accelerating the electron extraction. On the other hand, PBGH modification assists the formation of high-quality perovskite film with low defect density due to its strong interaction with PbI 2 . Consequently, the PBGH-modified PSC exhibits a champion power conversion efficiency (PCE) of 24.79%, which is one of the highest PCEs among all the FACsPbI 3 -based PSCs reported to date. In addition, the stabilities of perovskite films and devices under high temperature/humidity and light illumination conditions are also systematically studied.
研究领域:
材料科学
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太阳能
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光伏技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 41
·22206-22215
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IF 11.9
Jiaduo Wang,Zhuo Dong,Jiajun Wang,Junwei Zhang,Zeyu Zhai,Fazheng Qiu,Jinpeng Wu,Yuan Lin,Jingbo Zhang
The power conversion efficiency (PCE) of perovskite solar cells (PSCs) is seriously affected by the conductivity and energy alignment of the electron transport layer (ETL). However, poor film quality leads to low conductivity and interface energy level mismatch, which limits the performance of PSCs. Herein, a simple room-temperature (<35 °C) method is used to produce high-quality amorphous TiO2 thin films by vacuum ultraviolet (VUV) light (172 nm), to form composite ETLs with SnO2 for PSCs. The introduction of TiO2 produced perovskite films with larger grains and low trap density. The experimental results and density functional theory (DFT) analysis show that the composite ETL structure improves the electron mobility and conductivity, and the interaction with SnO2 accelerates the electron extraction due to favorable energy level alignment with the perovskite layer. Eventually, the composite ETL-based PSCs obtain a champion PCE of 24.59% (certified efficiency of 24.24%) and retain 92.4% of their initial PCE after 500 h of continuous light exposure.
研究领域:
材料科学
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光伏技术
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Si Jiang,Jun Xiao,Jieyi Tan,Xiangqi Li
Constructing heterojunctions is an important strategy for enhancing the separation efficiency of charge carriers in graphitic carbon nitride (g-C 3 N 4 ). Meanwhile, immobilization enables the recycle of g-C 3 N 4 -based photocatalysts from wastewater. Herein, a visible light-responsive MoS 2 and SnO 2 co-modified g-C 3 N 4 ternary heterostructure was synthesized via one-pot calcination and subsequently immobilized in a modified bacterial cellulose (BC) aerogel through freeze-drying. The prepared ternary heterojunction exhibited enhanced visible light-harvesting capacity and charge separation efficiency due to intimate interfaces and the synergy effect of different components. It showed a degrade rate constant 3.43 times higher than that of g-C 3 N 4 , and degraded 99.3 % of RhB (30 mg/L) at pH 6.5 after 30 min of irradiation, and 99.1 % at pH 5 after 15 min. Owing to dispersion improved by sodium dodecyl benzene sulfonate (SDBS) and the strength and hydrophobicity enhanced by methoxytrimethylsilane (MTMS), the prepared aerogel degraded 98.7 % of RhB (30 mg/L) at 60 min irradiation, and maintained 94.0 % after 6 cycles. This work demonstrates a highly efficient MoS 2 -SnO 2 -g-C 3 N 4 ternary photocatalyst and a practical immobilization route for application in purification of dye wastewater.
研究领域:
材料科学
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环境催化
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光催化
·
纳米材料
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废水处理
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2022
·Vol. 28
·期 10
·4599-4610
·
IF 2.961
Zheng Weiguo,Nie Shuqing,Chen Kaiyi,Li Rui,Qin Yao,Xiao Wei
Novel nitrogen–doped carbon (NC) coating encapsulating block-like Sn/SnO 2 (Sn/SnO 2 @NC) composite powders are successfully synthesized via hydrothermal, sol–gel, and subsequent heat treatment processes, which are characterized by XRD, SEM, thermogravimetric, Raman, and XPS. The results indicate that the Sn/SnO 2 @NC-2 composite powders are uniformly distributed in the NC matrix in the presence of 7.000 g of acrylamide. Moreover, the Sn/SnO 2 @NC-2 composite powders deliver high initial discharge specific capacity of 1132 mAh g −1 and decent capacity of 471.4 mAh g −1 after 100 cycles at 100 mA g −1 when the composite powders are evaluated as anode materials for lithium-ion batteries. The improved electrochemical performance of Sn/SnO 2 @NC-2 is mainly ascribed to the NC coating that can relieve the volume expansion and provide multiple charge transfer channels for electrons to consolidate the structural stability and promote the electronic conductivity of the Sn/SnO 2 anode materials, respectively. Therefore, the Sn/SnO 2 @NC-2 composite powders can be a promising and attractive anode material for lithium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Xinmei Qi,Liwu Huang,Yungui Chen
The commercialization of lithium sulfur batteries faces great challenges, such as shuttle effect and low conductivity. Herein, we explore embedding anoxic oxide SnO2–x in a porous carbon matrix as a separator-modifying material for lithium sulfur batteries. This material can limit the size of SnO2–x particles and reduce their agglomeration through confining by the porous carbon (PC). As a result, more adsorption and catalytic sites can be obtained. Moreover, the oxygen vacancies in SnO2–x can change the electronic environment to enhance the adsorption and catalysis of polysulfides, resulting in the depression of the shuttle effect of the battery. Therefore, the lithium sulfur battery with the SnO2–x/PC-modified separator has excellent cycling performance. At a current rate of 1 C, it can provide a high initial discharge capacity of 1049.4 mAh g–1 and maintain a reversible specific capacity of 798.4 mAh g–1 after 300 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yingcai Wang,Min Chen,Can Wang,Xiaoyang Meng,Weiqiu Zhang,Zefang Chen,John Crittenden
Methylisothiazolinone (2-methyl-4-isothiazolin-3-one) (MIT) is a commonly used biocide in wastewater treatment processes. Residual MIT in wastewater leads to high environmental risks and toxicity. The degradation of MIT via electrochemical oxidation, including kinetics, energy efficiency, oxidation mechanism and degradation pathway, was investigated in this study. Findings from energy and cost evaluation by using electrochemical technology were compared with those of other technologies. Experimental results indicate that electrolyte, current density and initial concentration can significantly affect MIT degradation. The lowest electrical energy per order was less than 3.85 kWh m −3 when NaCl was used as the electrolyte. Electrochemical degradation is advantageous because it can be easily applied without adding chemicals into wastewater and has relative low costs. The oxygen evolution, production of recalcitrant byproducts, and the mass transfer limitation resulted in the decrease of instantaneous current efficiency and mineralization current efficiency. Electron efficiency analysis demonstrated that 68.8% of the electrons used for MIT oxidation were effectively utilized to mineralize MIT into CO 2 . The proportion of direct and indirect oxidation of MIT during electrochemical degradation was quantitatively determined as 37.7% and 62.3%, respectively. HO was the most effective species for MIT degradation. MIT degradation pathway was proposed, in which the C C bond in MIT was broken down. C 3 H 7 NOS and C 3 H 7 NO 4 were detected, indicating the occurrence of ring opening reaction. Sulfur was oxidized into SO 4 2− and cleaved from C 3 H 7 NOS.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）