SCRIPTA MATERIALIA
·
2023
·
IF 6
Ziling Jiang,Chuang Yu,Shaoqing Chen,Chaochao Wei,Cong Liao,Zhongkai Wu,Shuai Chen,Shijie Cheng,Jia Xie
Lithium argyrodites electrolyte with high ionic conductivity and relatively lower cost show great potential as candidates for solid-state batteries. Further improvement of their conductivities can accelerate their applications. One of the means to significantly promote the conductivity of Li-ion is dual doping. Herein, Ag/Br dual-doping strategy is applied on Li 6 PS 5 Br (2.76 mS cm −1 ) to boast its conductivity to 6.15 mS cm −1 for Li 5.55 Ag 0.05 PS 4.6 Br 1.4 . The structural variations and chemical/electrochemical stability of the obtained electrolyte are carefully investigated. Li 3 InCl 6 electrolyte is introduced in the new battery configuration to mitigate the interfacial instability with LiNi 0.6 Mn 0.2 Co 0.2 O 2 active material enabling good electrochemical performances . The assembled battery delivers a discharge capacity of 160.8 mAh g −1 for the 1st cycle and maintains 85.9% of the initial value after 50 cycles at 0.5C. This modification strategy was proved effective for increasing the conductivity of sulfide electrolytes in this work.
研究领域:
材料科学
·
电化学
·
电池技术
·
固态电解质
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 5
·721
·
IF 4.034
Zhencai Dong,Chao Xu,Yongmin Wu,Weiping Tang,Shufeng Song,Jianyao Yao,Zhengyong Huang,Zhaoyin Wen,Li Lu,Ning Hu
Garnet Li7La3Zr2O12is one of the most promising solid electrolytes used for solid-state lithium batteries. However, low ionic conductivity impedes its application. Herein, we report Ta-doping garnets with compositions of Li7-xLa3Zr2-xTaxO12(0.1 ≤ x ≤ 0.75) obtained by solid-state reaction and free sintering, which was facilitated by graphene oxide (GO). Furthermore, to optimize Li6.6La3Zr1.6Ta0.4O12, Mg2+was select as a second dopant. The dual substitution of Ta5+for Zr4+and Mg2+for Li+with a composition of Li6.5Mg0.05La3Zr1.6Ta0.4O12showed an enhanced total ionic conductivity of 6.1 × 10−4S cm−1at room temperature. Additionally, spark plasma sintering (SPS) was applied to further densify the garnets and enhance their ionic conductivities. Both SPS specimens present higher conductivities than those produced by the conventional free sintering. At room temperature, the highest ionic conductivity of Li6.5Mg0.05La3Zr1.6Ta0.4O12sintered at 1000 °C is 8.8 × 10−4S cm−1, and that of Li6.6La3Zr1.6Ta0.4O12sintered at 1050 °C is 1.18 × 10−3S cm−1.Keywords:garnet;dual substitution;spark plasma sintering;conductivity
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
Journal of Energy Chemistry
·
2020
·
IF 7.216
Bo Xu,Xiaodong Yang,Qiang Fang,Linbing Du,Yan Fu,Yiqiang Sun,Qisheng Liu,Qingquan Lin,Cuncheng Li
Developing of high-performance and low-cost electrocatalysts is of great significance to reduce the overpotential and accelerated the reaction rate of oxygen evolution in water splitting and related energy conversion applications. Herein, Fe, O-dual doped Ni 2 P (Fe, O Ni 2 P) nanoarray is successfully synthesized on carbon cloth demonstrating enhanced electrocatalytic activity and stability for oxygen evolution reaction (OER) under alkaline media . The as-synthesized Fe, O Ni 2 P nanoarray exhibits obviously improved OER performance with a low overpotential of 210 mV at 10 mA cm −2 current density and a Tafel slope of 48 mV dec −1 , as well as long-term durability. The strong coupling interaction induced changes in electronic structure lead to relatively higher oxidation state and stronger oxidation ability of the Fe, O Ni 2 P nanoarray, together with the high electrochemical surface area and good conductivity contribute to the superior OER performance. This work highlights the anion-cation dual doping strategy may be an effective method for fabrication of catalysts relating to energy conversion applications.
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 COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wenxiang Sheng,Xiaoxing Zhou,Sara Ajmal,Xiao Chen,Yuanhang Ma,Ping Chen,Mangzhou Zhu,Peng Li
Developing dual-functional electrocatalysts for urea-water decomposition still faces significant challenges. In this study, the vanadium (V) and cerium (Ce) co-doped FeCoNi medium-entropy phosphide (VCe-FeCoNiP/NF) were effectively fabricated on nickel foam (NF) via “two-step method,” which involved hydrothermal treatment followed by phosphorization. Experimental results indicate that, benefiting from dual-ion doping and medium-entropy configuration, VCe-FeCoNiP/NF demonstrates unique electronic effects among the multimetallic elements, thereby exhibited remarkable catalytic activity for both urea oxidation reaction (UOR) and hydrogen evolution reaction (HER). Under urea-water conditions (1 M KOH with 0.33 M urea), the VCe-FeCoNi/NF catalyst merely required 1.338 V (vs RHE) and an overpotential of 173 mV to attain a current density of 100 mA·cm −2 for UOR and HER, respectively. Moreover, it could stably operate at a current density of 20 mA·cm −2 for 225 h in overall urea-water decomposition. This work provides new insights for designing high-performance urea-water electrolysis catalysts.
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
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Yanan Yan,Lin Li,Huilin Zhang,Fangfang Du,Yating Meng,Shaomin Shuang,Ruibing Wang,Shengmei Song,Chuan Dong
The B,N dual-doped carbon dots (B,N-CDs) for ratiometric fluorescence detection the morin were prepared from sodium tetraborate and polyethyleneimine through the single-step hydrothermal method . The B,N-CDs exhibited the optimum excitation and emission wavelength at 340 nm and 467 nm, respectively. Interestingly, the intensities of emission peak at 467 nm of B,N-CDs reduced meanwhile a new peak emerged at 560 nm with the continuous addition of morin, which revealed the ratio fluorescence characteristic between F 560nm /F 467nm and morin concentration with the linearity range and detection limit of 14.5–32.5 μmol/L and 0.3 μmol/L (S/N = 3), respectively. The interference of common antibiotics and remedies could be ignored when the concentration of morin was detected by the B,N-CDs, which demonstrating the outstanding selectivity. Furthermore, the proposed fluorescence method is used to detect morin in urine with recoveries are 99.8–104.5%. The results of this research indicate the feasibility and practicality of B,N-CDs as an effective fluorescent probe for the determination of morin.
研究领域:
分析化学
·
材料科学
·
药物分析
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLID STATE IONICS
·
2020
·
IF 3.107
Xuefeng Shen,Qian Zhang,Tianxiang Ning,Jianlei Liu,Taoyong Liu,Zhiwei Luo,Yao He,Chunchun Qin,Anxian Lu
Garnet solid electrolyte is the most promising candidate among inorganic solid electrolytes due to its wide potential window, good compatibility and high safety. In this work, a dual doping strategy is offered for the development of garnet-type electrolytes with high ionic conductivity . Te 6+ is introduced into the Zr sites to stabilize the high-ionic conductivity cubic phase. Simultaneously, Sr 2+ enter the La sites to achieve a fine-tuning of the Li + concentration by charge compensation, acting as a sintering agent of Te 6+ /Sr 2+ doped electrolytes. The structure, chemical composition and ionic conductivity of Li 7 − 2 y + x La 3 − x Sr x Zr 2 − y Te y O 12 ( x = 0–0.25, and y = 0.35) electrolytes are systematically investigated by X-ray diffraction, Raman spectroscopy , scanning electron microscope , Energy Dispersive X-ray Spectroscopy, Inductively Coupled Plasma-Optical Emission Spectrometry and Alternating Current impedance. The results show that the optimal amount of Sr 2+ substitution helps to reduce the total resistance by promoting the growth of grains and ceramic densification . Among the investigated compositions, the composition with Li 6.425 La 2.875 Sr 0.125 Zr 1.65 Te 0.35 O 12 exhibits excellent performance with relative density of 97.95%, conductivity of 4.27 × 10 −4 S cm −1 at 25 °C and activation energy of 0.30 eV. The assembled Li/Li 6.425 La 2.875 Sr 0.125 Zr 1.65 Te 0.35 O 12 /Li symmetrical batteries are cycled galvanostatically under different current densities. The results show that the symmetrical battery can achieve good cyclic stability, good Li + stripping and plating process and low overpotential.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Metals
·
2023
·Vol. 13
·期 3
·518
·
IF 2.9
Weigang Zhao,Cuirong Liu,Xu Yin
The sodium battery is one of the best energy storage technologies due to its abundant resource reserves and excellent energy storage ability. As a two-dimensional layered transition metal, molybdenum selenide (MoSe2) has large interlayer spacing and a high theoretical capacity (470 mAh∙g−1). Its structure is suitable for the negative electrode of sodium-ion batteries, with a large ionic radius and slow ion diffusion kinetics. However, it is difficult for the rate capability and cycling performance of MoSe2to meet practical needs due to a weak intrinsic electron transport ability and volume expansion during sodium absorption. The hydrothermal synthesis method was used to synthesize the MoSe2complex based on boron and nitrogen dual-doped 3D carbon fibers obtained from bacterial cellulose membranes (MoSe2/N&B-BCM) for sodium batteries. Additionally, electrochemical analysis and experimental characterization were performed. In summary, the experimental analysis shows that MoSe2/N&B-BCM has excellent conductivity, structural integrity, cyclability (328 mAh∙g−1after 100 cycles at a 0.5 c constant rate), and rate stability.
研究领域:
材料科学
·
电化学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2025
·
IF 4.8
Song Jiangxiao,Yu Yihao,Zhang Yan,Wu Jiahui,Wang Wei,Qi Dongming
The lightweight and adjustable properties of electromagnetic interference (EMI) shielding textiles make them an ideal choice as a layer in firefighting suits designed for complex electromagnetic environments. Enhancing the flame retardant performance of EMI shielding textiles is essential to mitigate rapid combustion risks in extreme conditions, such as high temperatures or fires, thereby reducing fire spread and minimizing damage caused by fire escalation. This study demonstrates the rapid and efficient preparation of flame retardant EMI shielding textiles by employing a spray method to coat cotton fabrics with Poly (3,4-ethylenedioxythiophene)-poly (styrenesulfonate) (PEDOT:PSS) doped with ethylene glycol (EG) and phytic acid (PA). The resulting coating exhibited a shielding effectiveness test (SE T ) value of 46.61 dB, effectively blocking 99.99% of electromagnetic waves (EMWs). Even after undergoing 600 bending cycles, the SE T value could still maintain 42.34 dB. PA not only functions as a dopant to significantly enhance the electrical conductivity of PEDOT:PSS but also confers superior flame retardant properties. In comparison with untreated cotton fabric, the peak heat release rate (pHRR) was reduced from 140.77 to 10.73 kW/m 2 , representing an impressive reduction of 92.37%. The total heat release (THR) decreased from 3.97 to 2.04 MJ/m 2 , marking a substantial decrease of 48.61%. The coated fabric exhibited excellent flame retardant and EMI shielding performance. Furthermore, this innovative material is anticipated to find extensive applications in smart wearables and sensor technologies.
研究领域:
材料科学
·
纺织工程
·
防火材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yifei Chen,Meng Li,Qin Zhu,Wei Bai,Xiaofang Liu,Mingwu Xiang,Junming Guo,Jintao Liu
The Jahn-Teller effect and Mn dissolution always restrict the practical electrochemical properties of spinel LiMn 2 O 4 cathode material. Herein, a low-temperature solid-state combustion method is employed to synthesize various truncated octahedral LiZn 0.03 Al x Mn 1.97- x O 4 ( x ≤ 0.08) with submicron structure. The Zn/Al dual-doping is conducive to forming {110} and {100} planes, and is also beneficial to the crystal development of LiMn 2 O 4 . It is found that as the amount of Al doping increases, the average particle size gradually decreases from 188 nm to 113 nm. In addition, the Zn/Al co-doping integrated with small particles can improve the high-rate performance. The optimal LiZn 0.03 Al 0.03 Mn 1.94 O 4 exhibits submicron truncated octahedral morphology, high crystallinity , and good particles dispersibility . Benefiting from these structure merits, the LiZn 0.03 Al 0.03 Mn 1.94 O 4 delivers the first discharge capacity of 113.1 mAh⋅g −1 and low capacity fade of 9.9 % after 300 cycles at 1C. It also shows the high first discharge capacity of 86.6 mAh⋅g −1 at 10C and the high capacity retention of 72.1 % after 2000 cycles. Even at ultrahigh current density of 15C and 20C, the ultralong cycling lifespans over 2000 cycles are also achieved in LiZn 0.03 Al 0.03 Mn 1.94 O 4 cathode material. The excellent electrochemical properties are ascribed to its relatively high Li + diffusion coefficient (1.60 × 10 −11 cm 2 ⋅s −1 ) and low apparent activation energy (25.45 kJ⋅mol −1 ) during the de-intercalation process. The Zn/Al dual-doping and submicron truncated octahedron designs of the LiMn 2 O 4 provide a scientific reference to prepare high-performance cathode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Yu Yang,Zhikun Xu,Tianle Li,Xinzhi Ma,Shuangyan Lin
The development of versatile oxygen evolution reaction (OER) electrocatalysts for ampere-level seawater electrolysis holds enormous promise for clean energy generation. Still, it is hindered by the competing chlorine evolution and severe chloride corrosion. Herein, the V and Fe dual-doped Ni 3 S 2 /Ni(OH) 2 (VFe-Ni 3 S 2 /Ni(OH) 2 ) heterostructure was fabricated on nickel foam as an OER catalyst for direct seawater electrolysis. The dual-doping of V and Fe optimizes the electronic structure cooperatively, improves conductivity, and enriches active sites of Ni 3 S 2 /Ni(OH) 2 , boosting OER performance at ampere-level current density. The optimal electrode V 0.03 Fe-Ni 3 S 2 /Ni(OH) 2 requires only 385 mV overpotential to arrive 1 A/cm 2 and works stably for over 100 h at 100 mA/cm 2 in seawater electrolyte. The assembled electrolyzer V 0.03 Fe-Ni 3 S 2 /Ni(OH) 2 ||Pt/C exhibited a cell voltage of 1.52 V at 10 mA/cm 2 with a noteworthy stability of 100 h at 100 mA/cm 2 for seawater electrolysis, providing huge potential for hydrogen production from seawater.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 15
·期 3
·2528-2538
·
IF 1.5
Wenhui Geng,Mengmeng Zheng,Dan Chen,Xianwen Wang,Zekai Zhang,Yishan Lin,Dongqin Cai,Huiqin Li,Guobo Huang,Yanxian Jin Yu,Binbin Yus
Palladium catalyst (Pd) are made attention to application in alcohol fuel cells due to unique performance, as well as the resource abundance and low cost, but the catalyst performance and stability of the catalysts are still not satisfied. In this article, the novel PdFe/B-N-G catalysts with the double element alloying and dual-doping for ethanol electro-oxidation are successfully prepared and determined by XRD, TEM and XPS. TEM results reveal a relatively uniform and high dispersion of Pd particles is observed on PdFe/B-N-G catalyst. The XPS analysis indicates that Pd(0) contents of the PdFe/B-N-G catalyst are increased on account of the B, N-doping effect. Being explored as the catalyst to the ethanol oxidation reactions, the PdFe/B-N-G catalysts exhibit the better electrocatalytic activity with higher current densities and catalyst stability compared to those of PdFe/G and Pd/B-N-G, which can be attributed to the synergistic effect of the enhanced PdFe alloying and the B, N-doping, that can produce more activity sites dispersing on the surface of graphene. Thus, the novel PdFe/B-N-G catalysts can be the potential alternate in alcohol fuel cells.
研究领域:
电化学
·
纳米催化
·
能源材料
·
燃料电池
·
表面科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Jian Chen,Jianpo Chen,Hao Cui,Chengxin Wang
Designing a state-of-the-art nonprecious oxygen evolution reaction (OER) electrocatalyst with ultralong stability under high current density (≥100 h under 1000 mA cm–2) is greatly desirable for the viable electrolysis of water. The synthesis of nanostructure catalysts is an effective method for improving the OER performance, but nanostructure-based catalysts are easily destroyed by mechanical force via the vigorous oxygen gas evolution process at a high current density. Herein, we present a facile strategy of N-anion and Fe-cation dual doping to construct a three-dimensional self-supported nickel selenide film-based catalyst via a one-step chemical vapor deposition process. The film exhibits outstanding OER activity with a small Tafel slope of 34.86 mV dec–1 and an overpotential of 267 mV at 100 mA cm–2 in 1 M KOH media. Impressively, the film-based catalyst can maintain this excellent catalytic activity over 100 h, even when operated at a high current density of 1 A cm–2, thus exhibiting the best reported OER stability under high current density so far. Further studies reveal that anion–cation co-doping can simultaneously modulate the electronic state and phase structure of nickel selenide, thereby promoting the in situ formation and transformation of oxygen-vacancy-rich amorphous OER active species and resulting in the superior OER performance of the film-based catalyst.
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
危险品化学品经营许可证（带存储）