JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Zhenglu Zhu,Kaikai Bai,Haibin Zuo,Enyu Ma,Zhiqiang Xu,Lincheng Liu
Rapid technological advancements and increasing demand for the efficient utilisation of global resources have promoted the design and development of sustainable anode materials to achieve batteries with high specific capacities and excellent rate capability for energy-storage devices. Herein, a high-performance MnO nitrogen-doped carbon anode material for lithium-ion battery based on coffee residues, potassium permanganate, and urea is presented. MnO and N are uniformly embedded inside the carbon material, connected by N–Mn bonds. The introduction of N not only hinders the aggregation of Mn nanoparticles generated during lithiation, but also enhances the electrochemical activity of carbon and improves the electrical conductivity for better reaction kinetics. These benefitting factors promote the high reversible specific capacity of 768 mA h g −1 at the current density of 0.3 A g −1 , as well as superior cyclic and stability performance. The demonstrated high-performance and low-cost anode material also provides a sustainable route for the high-value-added utilisation of waste biomass.
研究领域:
材料科学
·
能源存储
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2022
·
IF 11.307
Xue Zhang,Xuelei Tian,Chang Liu,Jing Qiao,Wei Liu,Jiurong Liu,Zhihui Zeng
Metal-organic frameworks (MOFs) have attracted more and more attentions for preparing electromagnetic wave (EMW) absorption materials because of the porous structure , high specific surface area, and designable configuration. Herein, a series of MOF-74 derived nanocomposites were synthesized by hydrothermal process and subsequent carbonization . The EMW absorption performance and the functions of each component were investigated in depth. Moreover, the inherent EMW absorption mechanisms were comprehensively revealed. Benefiting from the synergistic effect of constituents and microstructure, the MnCo-MOF-74 derived MnO/Co/C nanocomposites delivered a minimum reflection loss value of −68.89 dB at the thickness of 2.64 mm and an effective absorption band of 5.3 GHz at the thickness of 2.3 mm. The high EMW absorption performance was ascribed to the optimized impedance matching and multiple attenuation mechanisms including interfacial and dipole polarization loss, magnetic loss, conductive loss, and multiple scatterings capability. This study shed light on exploring high-efficiency MOF-based EMW absorption materials with rational design of components and structure.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Hongfei Jiang,Ruirui Wang,Hanhua Liu,Qianqian Liu,Miao Cheng,Wujun Ma,Jing Hu,Tao Wei,Zeda Meng,Bo Liu,Muzi Chen,Wanfei Li
Fabricating efficient electrocatalysts for water splitting through recycling ternary (LiNi 1-x-y Mn x Co y O 2 ) cathodes of spent lithium-ion batteries (LIBs) is promising and sustainable, however, the relative reasonable phase composition and microstructure still need be explored. Herein, a composite material composed of multi-heterogeneous Ni 4 N/Co 5.47 N/MnO nanoparticles coupled with porous carbon fibers was fabricated through a direct carbothermal reduction process of waste LiNi 0.5 Mn 0.2 Co 0.3 O 2 (NCM523) cathodes material dispersed into nitrogenous spinning precursor. Interestingly, this optimized material obtained at 800 °C (NCM523@CF-800) possesses abundant Ni 4 N/Co 5.47 N/MnO multi-heterostructure, endowing it with multifaceted advantages as electrocatalysts for oxygen evolution reaction (OER). Specifically, the unique structural features of multi-heterostructure promote the transfer of electrons/charges on the interface, and highly enhance the reaction kinetics. Additionally, during OER process, because of the protection of carbon matrix, Ni 4 N/Co 5.47 N/MnO has the mere surface reconstruction and forms the real active oxygen-containing species especial NiOOH. And the maintained core of Ni 4 N/Co 5.47 N/MnO provides high conductivity for the formed active oxygen-containing species. As a result, the optimized NCM523@CF-800 employed as OER electrocatalyst in water electrolysis only require 271 mV to deliver a current density of 10 mA cm −2 in 1 M KOH. Meanwhile, an excellent stability of 140 h can be achieved under high current density of about 160 mA cm −2 . This work may pave the way for the rapid and efficient recycling and utilization of spent battery electrode materials.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Chunyong Zhang,Lei Su,Linna Huang,Jiehong Cheng,Jianning Li,Hengfei Qin
The carbon nanofiber composite containing Cu and MnO was fabricated by electrospinning method. The precursor solution was prepared by mixing Cupric Acetate Monohydrate, Manganous acetate, N,N-dimethylformamide (DMF) and polyacrylonitrile in a certain proportion. Then the material of Cu- MnO/CNF with higher capacitance was prepared by electrostatic spinning at 15 kV and high temperature heat treatment. The Cu-MnO/CNF was characterized by scanning electron microscopy (SEM) and X-Ray diffraction (XRD). It’s clear from the results that, carbon nanofiber had overlaped by metal oxides and metals, at the same time, the Cu(OAc) 2 was converted to Cu and the MnACAC was turned into MnO after thermal treatment. Through a series of electrochemical tests, it showed the Cu-MnO/CNF has excellent electrochemical performance and indicated its potential advantages for supercapacitors. The results indicated the specific capacitance of the Cu-MnO/CNF displayed a larger specific capacitance of 581 F/g than the electrical capacity of Cu-CuO/CNF and MnO-Mn(OH) 2 /CNF
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2016
·Vol. 118
·期 2
·605-619
·
IF 1.265
Wang Lei,Zhang Chuanhui,Huang He,Li Xuebing,Zhang Wei,Lu Mohong,Li Mingshi
MnO
x
catalysts were contrastively prepared by an alkali-promoted redox precipitation strategy (MnO
x
-RP) and a conventional citrate sol–gel method (MnO
x
-SG), and tested for the catalytic oxidation of toluene, where MnO
x
-RP exhibited higher catalytic activity, excellent catalytic durability under dry conditions and good regeneration ability under humid conditions. The characterizations results indicated that different crystalline phases but similar textual properties (specific surface area, porosity and morphology) were observed over MnO
x
-RP and MnO
x
-SG catalysts, while MnO
x
-RP presented significantly higher low-temperature reducibility and average oxidation state of Mn as well as higher abundance of surface adsorbed oxygen species compared with MnO
x
-SG, thus beneficially resulting in its superior catalytic activity in the reaction.
研究领域:
化学工程
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Jiajia Zhang,Xin Wang,Sumin Xu,Jianying Qu
In this study, NiMn MOFs were in-situ grown on Ti 3 C 2 and then calcined at high temperature to obtain the Ti 3 C 2 /MnO/NiNPs nanocomposites. A series of characterization including SEM, TEM, XRD, XPS and electrochemical techniques were carried out to investigate the elemental composition, morphology, structure and performance of the materials. The experiments demonstrated that the sensor based on this material has good electrocatalytic activity to redox reactions of ascorbic acid (AA) and dopamine (DA) and could simultaneously detect them. Under the optimal conditions, the oxidation currents of AA and DA showed significant linear relationships with their concentrations in the ranges of 50.00–6000.00 μM and 0.20–120.00 μM, respectively. The detection limits were 17.92 μM and 0.03 μM, respectively. This sensor could effectively detect AA and DA in artificial urine samples simultaneously, and exhibited good stability, repeatability, anti-interference ability and a wider linear range, showing potential application prospects.
✓ 已验证
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2021
·Vol. 32
·期 9
·3364-3371
·
IF 4.833
Zigui Luo,Xi'an Fan,Yanglin Zhang,Zhenjia Yang,Jian Wang,Zhaoyang Wu,Xin Liu,Guangqiang Li,Yawei Li
Fe-Si soft magnetic composites (SMCs) coated with MnO-SiO 2 composite coatings were fabricated via sintering the ball milled Fe-Si/MnO 2 composite powders. The transformation mechanism from MnO 2 coating to MnO-SiO 2 composite coatings was studied. The effect of MnO 2 content on the microstructure and magnetic properties of Fe-Si soft magnetic composites has also been investigated systematically. The analysis results indicated that MnO 2 would be reduced to MnO by Si in the Fe-Si particles at 780.1 ℃. When the temperature reached 985.8 ℃, the generated MnO and SiO 2 would further combine to form 2MnO·SiO 2 , finally forming the MnO-SiO 2 composite coatings. With the increase of the MnO 2 content from 0.0 wt% to 10.0 wt%, the MnO-SiO 2 composite coatings became thicker, thus the saturation magnetization and permeability decreased gradually. However, exorbitant MnO 2 content above 5.0 wt% would result in excessive in-situ Fe existed in the composite coatings and obvious reduction of Si content in the Fe-Si particles due to the above solid-state reactions. Therefore, the increasing trend of the resistivity was weakened. And the 5.0 wt% MnO 2 coated Fe-Si SMCs exhibited superior comprehensive performance such as high saturation magnetization (186.5 A·m 2 /kg), good permeability (71), low total core loss (362.6 mW/cm 3 at 50 kHz).
研究领域:
材料科学
·
磁性材料
·
复合材料
·
固态化学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 13
·2590-2598
·
IF 3.545
Hongyan Chen,Jiajing Zhou,Fuyuan Guo,Yaqian Wang,Yue Chen,Yan Liang,Yunlong Xu,Huang Zhang
Fabrication of porous micro/nanostructures with high electronic conductivity is very efficient for enhancing the electrochemical performance of transition metal oxide-based anode materials for lithium-ion batteries. Here, we successfully propose Zn2SnO4 composites functionalized using biomass-derived carbon and metal–organic framework derived MnO/C. The fabricated LC@Zn2SnO4@MnO/C composite exhibits superior electrochemical performance with a reversible capacity of 1185.6 mA h g−1 at 200 mA g−1 and maintains 552 mA h g−1 even at 2 A g−1 for 150 cycles. The significantly improved performance suggests that the unique structure constructed by MOF-derived oxide decoration and dual-carbon coating can efficiently enhance the material integrity and facilitate charge transfer upon repeated (de)lithiation processes, demonstrating a general strategy for the preparation of mixed-metal-oxide nanostructures for batteries with improved electrochemical performance.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Hongtao Wang,Hongtao Chen,Xin Hou,Hang Ye,Zhengzheng Guo,Zhengyan Chen,Yanling Jin,Yanli Du,Penggang Ren
Exploring renewable and green carbon materials with superior electrochemical performance is vital but challenging for promoting the practical application of supercapacitors . Herein, a novel Salvinia adnata based porous carbon decorated with MnO (SAC-MnO) composite was facilely fabricated from hyperaccumulator cultured in Mn ion-rich solution through hyperaccumulation and subsequent carbonization strategy. The prepared SAC-MnO composites displays hierarchical micro-mesoporous architecture with ultrahigh specific surface area (2396 m 2 g −1 ), which facilitates ion transportation and energy storage. Additionally, manganese oxides anchored on the carbon matrix could induce the generation of pesudocapacitance. The synergistic effect of double-layer capacitance and pseudocapacitance by porous carbon and manganese oxides enable the resultant electrode materials realize excellent electrochemical properties . As a result, the SAC-MnO electrode achieves an excellent specific capacitance of 436.8 F g −1 at a current density of 1 A g −1 in the three-electrode system. Meanwhile, the symmetric supercapacitor assembled by SAC-MnO displays an energy density of 9.573 Wh kg −1 at a power density of 694.4 W kg −1 and keeps a capacity retention over 94.7 % after 1000 cycles. This research provides a facile, sustainable and eco-friendly method to synthesize porous carbon decorated with transition metal oxides for high-efficiency energy storage devices.
研究领域:
材料科学
·
能源存储
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Zhiwen Chen,Siming Fei,Chenghao Wu,Peijun Xin,Shoushuang Huang,Linnéa Selegård,Kajsa Uvdal,Zhangjun Hu
Transition-metal oxides (TMOs) are potential candidates for anode materials of lithium-ion batteries (LIBs) due to their high theoretical capacity (∼1000 mA h/g) and enhanced safety from suppressing the formation of lithium dendrites. However, the poor electron conductivity and the large volume expansion during lithiation/delithiation processes are still the main hurdles for the practical usage of TMOs as anode materials. In this work, the CoSnO3@NC@MnO@NC hierarchical nanobox (CNMN) is then proposed and fabricated to solve those issues. The as-prepared nanobox contains hollow cubic CoSnO3 as a core and dual N-doped carbon-“sandwiched” MnO particles as a shell. As anode materials of LIBs, the hollow and carbon interlayer structures effectively accommodate the volume expansion while dual active TMOs of CoSnO3 and MnO efficiently increase the specific capacity. Notably, the dual-layer structure of N-doped carbons plays a critical functional role in the incorporated composites, where the inner layer serves as a reaction substrate and a spatial barrier and the outer layer offers electron conductivity, enabling more effective involvement of active anode materials in lithium storage, as well as maintaining their high activity during lithium cycling. Subsequently, the as-prepared CNMN exhibits a high specific capacity of 1195 mA h/g after the 200th cycle at 0.1C and an excellent stable reversible capacity of about 876 mA h/g after the 300th cycle at 0.5C with only 0.07 mA h/g fade per cycle after 300 cycles. Even after a 250 times fast charging/discharging cycle both at 5C, it still retains a reversible capacity of 422.6 mA h/g. We ascribe the enhanced lithium storage performances to the novel hierarchical architectures achieved from the rational design.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy Technology
·
2021
·Vol. 9
·期 4
·2100022
·
IF 3.631
Xianxing Mao,Xinyi Zhang,Yanfei Zeng,Ahmed Farid Halima,Pei Kang Shen
Aqueous zinc-ion batteries (AZIBs) are becoming increasingly popular energy storage technology compared with conventional lithium-ion and other rechargeable batteries. However, the poor structural stability and low conductivity remain a significant challenge in the development of the cathode material. This renders AZIBs with limitation of commercial secondary batteries. Herein, cathode optimization is demonstrated through precise control of the coupling of MnO with reduced graphene oxide (rGO) and multiwall carbon nanotubes (MWCNTs). 3D ternary MnO/rGO/MWCNTs (MPGC) nanostructures are synthesized by combining MnO nanoparticles with rGO and MWCNTs using a scalable hydrothermal and solid thermal reduction method. The MPGC cathode delivers a high specific capacity of 267.4 mAh g −1 at 0.2 A g −1 and improved stability with retention rate of 96.2% after 200 cycles at 0.5 A g −1 and 94.7% after 550 cycles at 1.2 A g −1 . This simple synthesis method has great potential in practical application of AZIBs as next-generation rechargeable batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Jiahui Fan,Guiting Wang,Rui Zhang,Xu Guo,Kun Li,Junwei Zhou,Jingfeng Wu,Kai Pan,Keying Shi
High-performance gas-sensitive materials must exhibit improved resistance to moisture essential criterion for their effectiveness. In this work, monodisperse triangle MnO nanocrystals were synthesized through the hot injection method. Then, they were evenly spread across the reduced graphene oxide (rGO) surface in a uniform dispersion. The optimized MnO/rGO exhibited high sensitivity (R a /R g =47.0) and quick response, with a lower detection limit. Furthermore, it shows strong moisture resistance in a high-humidity environment (80 % relative humidity). The comprehensive wrapping of stearate ligands proved highly effective in preventing water vapor infiltration. This robust shielding significantly boosted the composite's hydrophobic nature, markedly enhancing its resistance to moisture. This approach offers a pioneering avenue for gas sensors to detect NO 2 effectively at room temperature, even within high-humidity environments.
研究领域:
材料科学
·
纳米科技
·
传感器技术
·
环境监测
·
表面化学
✓ 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）