Nano Energy
·
2019
·
IF 15.548
Nan Wei,Jingsheng Cai,Ruochen Wang,Menglei Wang,Wei Lv,Haina Ci,Jingyu Sun,Zhongfan Liu
Lithium–sulfur battery is amongst the most promising next-generation energy storage technology owing to their high theoretical capacity and energy density . Nevertheless, the notorious shuttle effect of lithium polysulfides (LiPSs) seriously impedes its practical applications. Here, we report an all-CVD approach to realize the direct growth of ReS 2 @N-doped graphene (NG) heterostructure , which serves as an ultralight high-performance interlayer for elevated LiPS regulation via easy transfer onto the commercial separator. In contrast to the traditional interlayers constructed via vacuum filtration of nanostructured materials that inevitably increase the thickness and weight of the separator, our all-CVD-enabled ReS 2 @NG film possesses an area of 15 mm × 100 mm, a thickness of ~0.5 μm and a negligible areal weight of 80–90 μg cm −2 . Benefiting from the two-dimensional (2D) vertically-erected nanostructure , adsorptive ReS 2 -conductive NG interface, and favorable electrical conductivity , thus-derived ReS 2 @NG interlayer readily enhances reaction kinetics for LiPS conversion and boosts the reutilization of trapped LiPS whilst guaranteeing smooth transportation of lithium ions . Accordingly, an initial discharge capacity of 854 mAh g −1 with an average capacity decay of 0.064% per cycle after 800 cycles can be harvested at 2.0 C. Even at a high sulfur loading of 6.4 mg cm −2 , an initial areal capacity of 6.1 mAh cm −2 can be gained, which still retains 5.8 mAh cm −2 after 40 cycles at 0.1 C. This work is anticipated to shed light upon the construction of CVD-enabled versatile 2D heterostructures for enriching the interlayer design with multifunctionality and cost-effectiveness.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
界面工程
·
电池技术
✓ 已验证
DOI
高影响因子
Nano Energy
·
2020
·
IF 16.602
Jingyi Wu,Xiongwei Li,Zhixiang Rao,Xiaoning Xu,Zexiao Cheng,Yaqi Liao,Lixia Yuan,Xiaolin Xie,Zhen Li,Yunhui Huang
Lithium metal is a promising anode material for rechargeable batteries with high energy density . However, the uncontrollable dendrite growth severely hinders the commercialization of Li metal anode . Inspired by the “leveling” mechanism in traditional electroplating, we demonstrate that boron nitride nanosheets (BNNSs) as a liquid electrolyte additive can level out Li protrusions and enable dendrite-free Li metal anodes. 2D BNNSs can automatically and continuously flatten Li deposits and accommodate volume changes during Li plating/stripping. B atoms in BNNS as Lewis acid sites interact with Lewis basic anions in electrolyte, reducing Li + concentration gradient and unifying Li deposition. The collect effects of BNNS additive give rise to dendrite-free Li anodes over 400 h and deep plating/stripping up to 35 mAh cm −2 , as well as potential application in sub-zero temperature batteries (−20 °C). Li–S full cells using BNNS electrolyte also exhibit improved performance. This simple and effective strategy is applicable to develop dendrite-free Li or other metal anodes in high-performance energy storage devices.
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
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2021
·
IF 3.927
Nengyuan Zeng,Chenwei Wang,Chong Luo,Hongdong Zhao,Yuling Liu,Wantang Wang,Tengda Ma
This article proposed an improvement plan for the slurry to reduce the dishing caused during copper chemical mechanical polishing (CMP) of the interconnect structure. According to the difference in the pressure between the concave and convex parts of the copper film in the high-hardness polishing pad, polishing slurries were designed with a distinct difference in the polishing removal rate under high and low platen pressures to improve their planarization efficiency. 2 wt% GLY (glycine) and 1 wt% H 2 O 2 can provide a chemical dissolution effect, adding 0.1% TAZ (1,2,4-triazole) to slow down the corrosion mainly for the recession, by adjusting the slurry pH to 7. The polishing results showed that the slurry had a high copper removal rate (6772 Å/min) at high pressure (3.0 psi) and a much lower removal rate (3273 Å/min) at low pressure (1.2 psi). The pattern wafer polished with this slurry obtained relatively low dishing. The other comparison groups showed slight differences in copper removal rate at high and low pressure and a deeper dishing of the polished pattern wafer. In this paper, based on the analysis of static dissolution experiments, electrochemical experiments, and XPS experiments of copper films in different slurries, the chemical reaction mechanism of copper films in the solution system of GLY and H 2 O 2 was studied at different pH values. In addition, the inhibition mechanism of TAZ on the copper surface at different slurry pH values was proposed, including the properties of the TAZ molecule adsorption film on the copper surface, the uniformity of the surface coverage, and the thickness of the passivation layer . The results can reflect the polishing results to a certain extent despite some deviations, but it can also be used as a more reasonable argument to explain the optimization scheme of the slurry proposed in this article.
研究领域:
材料科学
·
微电子制造
·
表面化学
·
半导体工艺
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
CARBON
·
2019
·
IF 7.466
Lulu Chai,Linjie Zhang,Xian Wang,Leqiong Xu,Cheng Han,Ting-Ting Li,Yue Hu,Jinjie Qian,Shaoming Huang
The search on low-cost, ultra-stable, and high-performance non-novel metal replacements to the Pt-based catalysts for oxygen reduction reaction (ORR) is of great urgency. Herein, a bottom-up method has been proposed to synthesize unique hollow N-doped carbon spheres (HNCSs) from an initial amorphous coordination polymer (CP) template-assisted route for the first time. HNCSs exhibit competitively comparable high electrocatalytic ORR activity, excellent reaction selectivity , and stronger long-term stability and negligible methanol crossover effect compared to the commercial Pt/C under the alkaline medium . Together with the other two reported carbonaceous ORR catalysts, including SCSs and NGPCs , our HNCSs possess the lowest Tafel slope of 65.7 mV dec −1 which is close to Pt/C (62.6 mV dec −1 ), and show much enhanced ORR activity (J L = 5.34 mA cm −2 ) and stability (Retention = 96.5%, Time = 10 h). This CP-templated route for hollow carbon materials will shed light on a new synthetic strategy to prepare high-performance carbon-based and/or metal-free ORR catalysts.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源化学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Ziqin Liu,Xiaowei Wu,Pu Hu,Chaoqun Shang
The unrestrained Li dendrite growth impedes the performance of Li metal batteries (LMBs) and brings safety concerns. To mitigate the unfavorable effect of Li dendrites, in this work, a shield-like artificial interlayer composed of Si 3 N 4 is employed to achieve the desirable electrochemical performance of LMBs. The Si 3 N 4 -based interlayer can in-situ electrochemically react with Li to generate inorganic Li 3 N and Li x Si alloys: the former with high ionic conductivity can effectively enhance the Li + transference, while the latter with reversibility for Li + insertion/deinsertion can act as Li + reservoir to modulate Li + platting/stripping. Thus, the Si 3 N 4 -derived compound shield effectively defends against the attack of Li dendrites and suppresses their growth, with which the Li||Li cells can cycle at 1 mA cm −2 (1 mAh cm −2 ) up to 500 h and the LiFePO 4 (LFP) ||Li batteries can operate 400 cycles at 1C with 91.5 % capacity retention.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米科技
·
电池技术
✓ 已验证
DOI
高影响因子
Nanoscale Research Letters
·
2021
·Vol. 16
·期 1
·1-8
·
IF 4.703
Han Haisheng,Song Yanli,Zhang Yongguang,Kalimuldina Gulnur,Bakenov Zhumabay
In recent years, the development of lithium-ion batteries (LIBs) with high energy density has become one of the important research directions to fulfill the needs of electric vehicles and smart grid technologies. Nowadays, traditional LIBs have reached their limits in terms of capacity, cycle life, and stability, necessitating their further improvement and development of alternative materials with remarkably enhanced properties. A nitrogen-containing carbon nanotube (N-CNT) host for bimetallic sulfide (NiCo 2 S 4 ) is proposed in this study as an anode with attractive electrochemical performance for LIBs. The prepared NiCo 2 S 4 /N-CNT nanocomposite exhibited improved cycling stability, rate performance, and an excellent reversible capacity of 623.0 mAh g –1 after 100 cycles at 0.1 A g –1 and maintained a high capacity and cycling stability at 0.5 A g –1 . The excellent electrochemical performance of the composite can be attributed to the unique porous structure, which can effectively enhance the diffusivity of Li ions while mitigating the volume expansion during the charge–discharge processes.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
电池技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 12
·期 1
·256-266
·
IF 11.9
Shuohan Liu,Jieqing Shen,Zhikai Wang,Wensheng Tian,Xiujun Han,Zhixin Chen,Hui Pan,Lei Wang,Dongyu Bian,Cheng Yang,Shenmin Zhu
Instability caused by lithium dendrites and low oxidation potentials hinders the commercialization of poly(ethylene oxide) (PEO) based all-solid-state lithium metal batteries (ASSLBs). Herein, fluorinated carbon nitride (FCN) with a hierarchical porous structure was designed and fabricated to modify a PEO-based electrolyte. The resultant FCN effectively suppressed the lithium dendrite growth in ASSLBs and elevated the oxidation potential of the PEO-based electrolyte to as high as 5.2 V. The fluorine and nitrogen in the FCN resulted in the formation of a LiF- and Li3N-rich composite solid electrolyte interface (SEI) that prevented continuous side reactions between the Li metal anode and the electrolyte. The produced hierarchical structure has abundant mesopores, which provided fluent channels for Li ion diffusion without extra resistance and greatly promoted the cycling and rate performance of the batteries. By using this porous FCN modified electrolyte, Li–Li symmetrical cells exhibited an ultra-long lifespan of more than 2500 h at a current density of 0.1 mA cm−2. The ASSLBs combined with a high-voltage ternary cathode can work stably at high rates of 2C and 5C with capacity retentions of 87.8% after 150 cycles and 92.1% after 50 cycles, respectively. This work presents a facile and effective strategy for the design of polymer based electrolytes for high-voltage, high-rate ASSLBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
固体离子学
·
高分子化学
·
电池技术
✓ 已验证
DOI
高影响因子
IEEE SENSORS JOURNAL
·
2020
·Vol. 21
·期 2
·1404-1408
·
IF 3.073
Jingting Luo,Xiaoying Feng,Hao Kan,Hui Li,Chen Fu
Surface acoustic wave (SAW) devices show promising applications for highly sensitive gas sensors for continuously monitoring of hazardous and flammable gases when integrating with specifically designed sensing materials. Improving the SAW sensor's responses by using nanostructure sensing materialshas become a research hot topic in recent years. In this work, we presented a SAW room temperature NO2 gas sensor with high sensitivity using one-dimensional (1D) Bi2S3 Nanobelts as the sensing materials. SAW devices with thecentral frequency of ~200 MHz were fabricated on ST-cut quartz substrate as the sensing platform. The Bi2S3 Nanobelts were synthesized by solvothermal method and deposited onto SAW sensors using a spin-coating technology. The response of the prepared SAW gas sensors was 2 kHz when subjected to 10 ppm NO2 even at room temperature. Moreover, the sensor shows good selectivity, reversibility, and stability. The sensing mechanism of one-dimensional Bi2S3 nanobelts-based SAW sensors for NO2 detection was also be discussed.
研究领域:
传感器技术
·
纳米材料科学
·
环境监测
·
分析化学
·
功能材料
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 55
·44128-44136
·
IF 3.84
Yufang Tao,Qian Ni,Mingyu Wei,Dongsheng Xia,Xiaoxia Li,Aihua Xu
Semiconducting carbon nitride materials (g-C3N4) were investigated as metal-free catalysts for the activation of peroxymonosulfate (PMS) under visible light irradiation to degrade organic dyes in aqueous solution. X-ray diffraction, scanning electron microscopy, N2 adsorption/desorption isotherms, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy were used to characterize the properties of the material. The effect of several parameters including the concentration of catalyst, PMS and organic dye, and initial solution pH on its catalytic activity was also investigated. It was found that the obtained g-C3N4 can effectively activate PMS under visible light irradiation to generate strong sulfate radicals which was highly active for Acid Orange 7 (AO7) and other organic dyes degradation. The catalyst also presented a long-term stability during multiple runs. Based on intermediate detections, the degradation pathway of AO7 in the g-C3N4/PMS/Vis system was proposed. This study demonstrated a promising approach for the activation of green oxidant, PMS, by the newly-developed polymer photocatalysts for environmental remediation and oxidation catalysis.
研究领域:
环境化学
·
光催化
·
材料科学
·
水处理技术
·
氧化催化
·
纳米材料
✓ 已验证
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2023
·
IF 5
Shizhou Tan,Pengcheng Jian,Maocheng Shan,Yongming Zhao,Zhihua Zheng,Yiming Yang,Yuhui Zeng,Dan Xu,Zhenyu Chen,Changqing Chen,Feng Wu,Jiangnan Dai
In this work, we demonstrated tunable structured AlGaN-based nanoporous (NP) distributed Bragg reflectors (DBRs) with high-reflectivity through one-step vertical-lateral electrochemical etching (ECE). The aperture of nanopores in the doping layer and the size and density of V-pits on the surface of NP-DBRs can be tuned by controlling the etching bias. Furthermore, by further tuning the thickness of alternating layers, we achieved high reflectivity of NP-DBRs at multiple center wavelengths within the wavelength range from 280 to 800 nm. To explore its potential applications, MoS 2 with a photoluminescence (PL) emission in the red light region was grown for the first time on the NP-DBRs. Due to the light localized effect of surface V-pits and the high reflectivity of the bottom DBRs , the PL intensity of MoS 2 was significantly enhanced by a factor of 37.3 compared to the region without NP-DBRs. The PL enhancement of MoS 2 on porous AlGaN and different periodic NP-DBRs further validated the PL enhancement mechanism. The corresponding theoretical simulations also revealed that the PL enhancement should be attributed to the combined effect of enhanced light absorption and NP-DBRs induced emission interference. The fabricated AlGaN-based NP-DBRs provide a new approach for improving the quantum efficiency of two-dimensional layered materials, which holds significant importance for advancing the development of miniaturized and integrated 2D/3D heterogeneous structure systems in the field of optoelectronics.
研究领域:
光电子学
·
半导体材料
·
纳米光子学
·
二维材料
·
固体物理
·
表面科学
·
集成光子器件
✓ 已验证
DOI
高影响因子
CARBON
·
2018
·
IF 7.082
Xian Wang,Zuju Ma,Lulu Chai,Leqiong Xu,Ziyi Zhu,Yue Hu,Jinjie Qian,Shaoming Huang
Growing demand for clean and renewable energy resources has sparked intensive research on the development of an effective strategy to prepare non-noble metal electrocatalysts for oxygen evolution reaction (OER). Herein, we report a new type of N-doped carbon coated CoP particle/carbon nanotube composite (CNT-NC-CoP) has been synthesized by in situ nucleation and growth of ZIF-67 nanoparticles onto carbon nanotubes, which subsequently is treated with carbonization and phosphorization. Unique hierarchical structure endows as-obtained CNT-NC-CoP with high specific surface area , abundant exposed active sites, quick ion diffusion path , and good electrical conductivity , thus exhibiting the highest electrocatalytic capability with the low overpotential of 251 mV at the current density of 10 mA cm −2 and remaining long-term durability (overlapping LSV curve after 10 h). Besides, density functional theory (DFT) calculations reveal that CoOOH/graphene charged surfaces are more effective for facilitating intermediates adsorption and improving the corresponding catalytic activity .
研究领域:
材料化学
·
电化学
·
纳米材料科学
·
能源催化
·
功能材料
·
计算材料学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 18
·53492-53504
·
IF 5.8
Tang Hao,Liu Xiaolong,Li Yiren,Tian Jinglei,Hou Changjiang,Tian Mengkui,Zhu Tingyu
Based on the unique technique property of grate–kiln pellet production process and its demand of ultra-low emission of NO x , a low energy-consumed embedded selective catalytic reduction (SCR) denitration technology was proposed. The temperature of the NO x -containing tributary flue gas was 350–500 °C, which basically accorded with the temperature range of SCR by V 2 O 5 -based catalyst. Considering the potential inhibition effect of high SO 2 concentration (8000–10000 mg/m 3 ) and metal-containing dust in the pelletizing flue gas, the catalyst compositions were optimized to V 2 O 5 (0.5%) and WO 3 (5%), giving NO conversion over 90% with low yield of N 2 O by-product. Compared with the low-medium temperature SCR technology, it was no longer necessary to reheat the flue gas, showing a remarkable CO 2 emission reduction effect. The CO 2 emission reduction ratios were 94% and 66% contributed by the decrease of fuel and electricity consumption for the embedded SCR technology, respectively. The operating cost was also greatly reduced from 11.4 CNY/t-pellet to 3.1 CNY/t-pellet (Chinese Yuan).
研究领域:
环境工程
·
大气污染控制
·
化学工程
·
能源与环境科学
·
工业生态学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）