SURFACE REVIEW AND LETTERS
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2018
·
IF 0.734
MAO ZHOU,XIAOCAI LIANG,YUQING MIAO
The preparation of ultrathin Ni layer onto the surface of glassy carbon electrode (GCE) by molecule anchoring method was studied in this paper in which two steps were involved: molecule anchoring (GCE-M) and ultrathin Ni layer adsorption (GCE-M-Ni). The result showed that by simply anchoring some molecules (purpald, bismuthiol I, DPTA, EDTA-2Na, ferrotitanium and thiourea) onto the surface of GCE, the adsorption of Ni layer would be improved relatively, thus improving the electrocatalytic ability of GCE toward sucrose, fructose and glucose. It was believed that the anchoring of these molecules helped the following adsorption of Ni layer. Good electrocatalytic characteristics for sugars oxidation of GCE-purpald-Ni were observed in this work with the immediate response, wide linear range from 0 μ M to 800 μ M and low detection limit down to 0.49 μ M for the sensing of total sugar (TS) concentration. The common interfering molecule such as ascorbic acid was proved of no interfering effect on the detection. Also, GCE-purpald-Ni was successfully applied to detect TS concentration in orange juice samples with high recovery rate of more than 85%. It is concluded that the molecule anchoring method can be used to the adsorption of ultrathin Ni layer onto the surface of GCE and works as one of the promising nonenzymatic sensings toward sugars.
研究领域:
分析化学
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电化学
·
生物传感
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Min Xu,Junjie Lu,Zhefei Sun,Ming Yang,Bifu Sheng,Minfeng Chen,Jizhang Chen,Qiaobao Zhang,Xiang Han
Single crystalline Ni-rich layered oxide cathodes show high energy density and low cost, have been regarded as one of the most promising candidates for next generation lithium-ion batteries (LIBs). Extending the cycling voltage window will significantly improve the energy density, however, suffers from bulk structural and interfacial chemistry degradation, leading to rapidly cycle performance deterioration. Here, we propose a dual-modification strategy to synthesize La doping and Li 3 BO 3 (LBO) coating layers modified LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) by a facile one-step heating treatment processing. In-situ EIS and XRD, ex-situ XPS techniques are applied to demonstrate that the La diffused amorphous domains and Li 3 BO 3 passivating layers dampen the lattice distortion, enhance the interfacial chemistry behavior as well as lithium ion transportation kinetics. Specifically, surface La doping amorphous domains successfully suppress the intense lattice stress and volume changes induced by the phase transitions during lithiation/delithiation, thus avoiding the intergranular crack and enhancing the mechanical stability of the material. Moreover, the LBO layer formed by the consumption of residual lithium prevents successive parasitic reactions at the interface as well as provides rapid Li-ion diffusion channels. Furthermore, the coating layer also diminishes the residual lithium compounds, increasing the atmosphere stability and safety of LIBs. Consequently, the La doping and LBO coating NCM811 exhibits an exceptional initial specific capacity (230.6 mAh/g) at 0.5C under a high cutoff voltage of 4.8 V, and a 73.8 % capacity retention following 100 cycles. In addition, a superior specific capacity of 133.8 mAh/g is provided even at a high current density (4C). Our work paves a promising road to tackle the integral structure deterioration and interfacial instability of Ni-rich cathodes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Shibin Nie,Yupeng Liu,Lei Ye,Zongquan Zhao,Kexin Yang,Jinian Yang,Jingwen Wang
Epoxy resin (EP) is a highly versatile polymer extensively used in high-end applications, including aerospace components, electronics encapsulation and adhesives. To custom-design flame retardant materials for high-performance epoxy resins, a MOF-derived zeolitic imidazolate framework-8@nickel phyllosilicate (ZIF@Ni-PS) was synthesized through the in-situ assembly of nickel phyllosilicate nanoflowers. The results showed that the smoke suppression, flame retardancy, and mechanical properties of the EP composites containing 5 wt% ZIF@Ni-PS were significantly enhanced. The peak heat release rate (pHRR) and the peak smoke production rate (pSPR) were reduced by 33.2 % and 12.7 %, respectively. The presence of ZIF@Ni-PS promoted the formation of a dense, high-quality carbon layer that isolated heat and oxygen transfer, effectively reducing heat release during combustion and suppressing smoke generation. Furthermore, the imidazole ring and Zn ions on the surface of ZIF@Ni-PS facilitated the formation of coordination and hydrogen bonds with the epoxy (EP), thereby enhancing the dispersion, compatibility, and mechanical properties of the epoxy resin matrix. This study presents a straightforward preparation method for high-performance EP composites, providing a novel pathway for EP research.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2017
·
IF 6.844
Fengyu Xie,Huali Wu,Jirong Mou,Dunmin Lin,Chenggang Xu,Cong Wu,Xuping Sun
It is of great importance to design and exploit high-efficiency low-cost electrocatalysts for the oxygen evolution reaction (OER) under mild conditions for applications. In this Article, we propose that formation of a thin amorphous Ni carbonate layer on Ni 3 N nanoarray supported on carbon cloth (Ni 3 N NA/CC) is an effective strategy to boost its OER activity in at near-neutral pH. When used as a 3D non-noble-metal OER electrocatalyst, the resulting core–shell Ni 3 N@Ni-Ci NA/CC displays superior catalytic activity with extremely small overpotential of 400 mV for 20 mA cm −2 in 1.0 M KHCO 3 (bulk pH: 8.3). Moreover, it also exhibits considerable long-term electrochemical durability with its activity being preserved for at least 12 h. Conductive Ni 3 N nanoarray not only provides as the Ni source for in-situ electrochemical derivation of 3D Ni-Ci catalyst with high surface area, more exposed active sites and facilitated mass diffusion, but effectively prompts the electron transport from Ni-Ci shell to CC, enabling more efficient water oxidation electrocatalysis.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Yun Yi,Kaixu Yang,Rongfeng Hu,Fei Liu,Chaochuang Yin,Jianxin Cao,Zheng Chen
Enhancing the surface and structural stability has been a research focus of nickel-rich layered cathode materials in lithium-ion batteries (LIBs). This work introduced a dual-functional modification strategy. LZMP is coated on the LiNi0.90Co0.05Mn0.05O2 (NCM90) particle surface to protect the cathode particles from erosion by air and acidic electrolyte, suppressing side reactions between the cathode and H2O, CO2, and HF, and hence enhances the stability of the cathode–electrolyte interphase film. Meanwhile, NCM90 is doped with Zr4+ and Mg2+, which substitute for Ni3+ in the lattice transition metal layer and Li+ in the lithium layer, respectively. Zr4+ forms a stronger Zr–O bond, while Mg2+ performs as a pillar ion, suppressing variations of the lattice parameters and maintaining the layered structure during cycling. The enhanced surface and bulk structural stabilities improve the cycling and rate performances of the cathode material. At 25 °C, 1C, and 2.7–4.3 V, the initial discharge specific capacity and the capacity retention after 200 cycles of 1%LZMP–NCM90 were 180.9 mAh g–1 and 86.0%, respectively, exceeding those of NCM90 (172.7 mAh g–1 and 76.4%). In summary, the LZMP modification synergistically alleviates the surface and bulk structure deterioration, thus preserving the electrochemical performance and improving the structural and cycling stability of NCM90.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2015
·
IF 2.999
Wenle Ma,Li Wang,Junying Xue,Hongtao Cui
Monolayer nanosheets of Co–Ni layered double hydroxides (LDHs) were synthesized by an ultra-large scale strategy under very moderate condition. The simple grinding of nickel nitrate hexahydrate and cobalt nitrate hexahydrate in morpholine at room temperature produced monolayer nanosheets. At least 40 g monolayer nanosheets can be produced in one batch. The capacity for the production of nanosheets is only limited by the facility used in the laboratory. The formation of monolayered hydroxide is attributed to the complete consumption of water in the water-deficient environment by the hydrolysis reaction between water and morpholine. The water consumption would consequently eliminate the possibility of interlayer hydrogen-bonding, avoiding the stacking of already produced monolayers. Because of the monolayer state of LDHs and the synergistic effect of cobalt ions in LDHs, the nanosheets presented high electrochemical performance.
研究领域:
材料科学
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化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Qingyu Dong,Jizhen Qi,Jian Wang,Lianghao Jia,Xuechun Wang,Liyi Zhao,Yuwei Qian,Haiyang Zhang,Hui Shao,Yanbin Shen,Liwei Chen
Integrating high-nickel layered oxide cathodes with aqueous slurry electrode preparation routes holds the potential to simultaneously meet the demands for high energy density and low-cost production of lithium-ion batteries. However, the influence of dual exposure to air and liquid water as well as the heating treatment during aqueous slurry electrode processing on the high-nickel layered oxide electrode is yet to be understood. In this study, we systematically investigate the structural evolution and electrochemical behaviors when LiNi 0.83 Mn 0.05 Co 0.12 O 2 (NMC83) is subjected to aqueous slurry processing. It was observed that the crystal structure near the surface of NMC83 is partially reconstructed to contain a mixture of rock-salt and layered phases when exposed to water, leading to the deteriorated rate capability of the NMC83 electrodes. This partial surface reconstruction layer completely converts into a pure rock-salt phase upon cycling, accompanied by the release of O 2 , Ni leaching, catalyzed decomposition of the electrolyte, and the formation of a thick cathode electrolyte interphase layer. The byproducts of the electrolyte and dissolved Ni could shuttle to the Li metal side, causing a crosstalk effect that results in a thick and unstable solid electrolyte interphase layer on the Li surface. These in combination severely undermined the cycling stability of the NMC83 electrodes obtained from the aqueous slurry. A mitigation strategy using molecular self-assembly technique was demonstrated to enhance the surface stability of water-treated NMC83. Our findings offer new insights for tailoring ambient environment stability and aqueous slurry processability for ultra-high nickel layered oxide and other water-sensitive cathode materials.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2021
·Vol. 5
·期 8
·2301-2312
·
IF 6.367
Xueying Qiu,Jiaxi Liu,Shujun Qiu,Pengru Huang,Hailiang Chu,Yongjin Zou,Huanzhi Zhang,Fen Xu,Lixian Sun
It is a very challenging task to develop high-performance metal catalysts for hydrolytic dehydrogenation of ammonia borane (AB, NH3BH3). In this work, cobalt–nickel layered double oxide (CoNi-LDO) with a sea urchin-like structure is prepared through the calcination of its corresponding layered double hydroxide (CoNi-LDH). As a catalyst support, ruthenium nanoparticles are loaded on CoNi-LDO by chemical reduction to form Ru/LDO catalysts. The effect of the reduction method (i.e., liquid-phase reduction and gas-phase reduction) and the auxiliary reagent citric acid (CA) on their catalytic properties for hydrogen production from AB hydrolysis is systematically studied. It takes only about 85 s at room temperature for the completion of AB hydrolysis in the presence of the as-prepared Ru-CA/LDO-G catalyst, which exhibits a much lower activation energy (Ea = 25.94 kJ mol−1) and relatively higher activity (TOF = 501.4 molH2 molRu−1 min−1). These experimental results are further confirmed by theoretical calculations, during which there is strong adsorption of AB molecules and easy activation of water molecules on Ru/LDO-G. Therefore, Ru/CoNi-LDO as a catalyst exhibits potential application in the field of hydrogen evolution from hydrolysis of hydroborates such as AB and NaBH4.
研究领域:
材料科学
·
催化化学
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能源化学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Lu-Nan Zhang,Guang-An Jia,Cheng Ma,Meng-Qi Jia,Tang-Suo Li,Lu-Bin Ni,Guo-Wang Diao
The electrocatalytic reduction of NO2– (NO2RR) holds promise as a sustainable pathway to both promoting the development of emerging NH3 economies and allowing the closing of the NOx loop. Highly efficient electrocatalysts that could facilitate this complex six-electron transfer process are urgently desired. Herein, tremella-like CoNi-LDH intercalated by cyclic polyoxometalate (POM) anion P8W48 (P8W48/CoNi-LDH) prepared by a simple two-step hydrothermal–exfoliation assembly method is proposed as an effective electrocatalyst for NO2– to NH3 conversion. The introduction of POM with excellent redox ability tremendously increased the electrocatalytic performance of CoNi-LDH in the NO2RR process, causing P8W48/CoNi-LDH to exhibit large NH3 yield of 0.369 mmol h–1 mgcat–1 and exceptionally high Faradic efficiency of 97.0% at −1.3 V vs the Ag/AgCl reference electrode in 0.1 M phosphate buffer saline (PBS, pH = 7) containing 0.1 M NO2–. Furthermore, P8W48/CoNi-LDH demonstrated excellent durability during cyclic electrolysis. This work provides a new reference for the application of POM-based nanocomposites in the electrochemical reduction of NO2– to obtain value-added NH3.
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
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Ying Wang,Mengfei Qiao,Liqing Qiao,Kang Shi
Iron-nickel layered hydroxide (FeNi LDH) electrocatalysts have low overpotential for the oxygen evolution reaction (OER) in alkaline environments but poor conductivity. The cutting-edge solution is to combine nano-FeNi LDHs with conductive carbon materials. However, the inevitable carbon corrosion during alkaline electrolysis makes it challenging to preserve conductivity between the carbon matrix and nano-FeNi LDHs. This study proposes a novel riveting structural mechanism and a template-replacement synthesis strategy for preparing a high conductivity and stable composite electrocatalyst, i.e., FeNi LDH nanosheet-wrapped single-layer ordered mesoporous carbon (FeNi LDHs@SOMC). The SOMC is produced by carbonizing the resin on the refractory template of MgO/Mg(OH) 2 nanosheets , and then the product is immersed in a solution containing Ni 2+ and Fe 2+ ions for ion exchange under the template induction. Highly active NiFe LDH nanosheets, which are more insoluble than Mg(OH) 2 , grow from the mesopores of SOMC and wrap the SOMC so that the two are mechanically riveted together. This structure also allows electron transfer from all catalytic sites to SOMC at the nanoscale. The experimental results demonstrated that FeNi LDHs@SOMC is a superior composite electrocatalyst with an OER overpotential of 270 mV at 10 mA.cm −2 and a Tafel slope of 60 mV dec −1 . FeNi LDHs@SOMC exhibits extraordinary corrosion resistance and does not degrade after 12 h electrolysis. The study offers an alternative strategy for designing and synthesizing highly hybridized composite electrocatalysts.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
DOI
高影响因子
Nano Research
·
2022
·Vol. 16
·期 6
·8417-8424
·
IF 10.269
Li Wanxia,Jie Yulin,Chen Yunhua,Yang Ming,Chen Yawei,Li Xinpeng,Guo Youzhang,Meng Xianhui,Cao Ruiguo,Jiao Shuhong
Enhancing the cut-off voltage of high-nickel layered oxide cathodes is an efficient way to obtain higher energy density of lithium-metal batteries (LMBs). However, the phase transition of the cathode materials and the uncontrolled decomposition of the electrolytes at high voltage can lead to irreversible dissolution of transition metal ions, which might cause the crossover effects on the lithium metal anodes. Nonetheless, the mechanism and electrolyte dependence of the crossover effects for Li metal anodes are still unclear. Herein, we investigate the crossover effects between LiNi 0.8 Mn 0.1 Co 0.1 O 2 and Li-metal anode in two electrolyte systems. For ether-based electrolyte, its poor oxidation stability results in massive dissolution of transition metal ions, leading to dendrite growth on anode and rapid cells failure. Conversely, ester-based electrolyte exhibits good electrochemical performances at 4.5 V with little crossover effect. This study provides an idea for electrolyte systems selection for high-voltage LMBs, and verifies that the crossover effect should not be neglected in LMBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Kaili Yao,Bing Dai,Xiaojun Tan,Victor Ralchenko,Lei Yang,Benjian Liu,Zhenhua Su,Jiwen Zhao,Kang Liu,Jiecai Han,Jiaqi Zhu
Amorphous boron powders were applied to grow boron-doped diamond (BDD) films with chemical vapor deposition method. The material is nontoxic and noncorrosive compared to conventional boron sources such as boroethane. The mechanism for using solid boron source as the dopant in low temperature and low pressure has been explained with a non-equilibrium thermodynamic coupling model and optical emission spectroscopic analysis . The BDD film was utilized in a non-enzymatic glucose sensor. A porous Au/Ni layer was then placed on the BDD surface for enhanced sensitivity. The electrode was characterized by scanning electron microscopy, Raman spectra , X-ray diffraction, cyclic voltammograms and amperometric responses. Typically operated at a voltage of 500 mV, it demonstrated fast response to glucose thanks to its large surface, rapid electron transfer, and synergetic effects between Au and Ni. Two specific linear ranges are found, one between 0.02 and 2 mM, and a second one between 2 and 9 mM. The detection limit and the best sensitivity are 2.6 μM and 157.5 μAmM −1 cm −2 .
研究领域:
材料科学
·
分析化学
✓ 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）