eScience
·
2023
·
IF 0
Zhonggang Liu,Xi Liu,Bingchun Wang,Xinying Wang,Dongzhen Lu,Dijun Shen,Zhefei Sun,Yongchang Liu,Wenli Zhang,Qiaobao Zhang,Yunyong Li
Ultra-thick, dense alloy-type anodes are promising for achieving large areal and volumetric performance in potassium-ion batteries (PIBs), but severe volume expansion as well as sluggish ion and electron diffusion kinetics heavily impede their widespread application. Herein, we design highly dense (3.1 g cm −3 ) Ti 3 C 2 T x MXene and graphene dual-encapsulated nano-Sb monolith architectures (HD-Sb@Ti 3 C 2 T x -G) with high-conductivity elastic networks (1560 S m −1 ) and compact dually encapsulated structures, which exhibit a large volumetric capacity of 1780.2 mAh cm −3 (gravimetric capacity: 565.0 mAh g −1 ), a long-term stable lifespan of 500 cycles with 82% retention, and a large areal capacity of 8.6 mAh cm −2 (loading: 31 mg cm −2 ) in PIBs. Using ex-situ SEM, in-situ TEM, kinetic investigations, and theoretical calculations, we reveal that the excellent areal and volumetric performance mechanism stems from the three dimensional (3D) high-conductivity elastic networks and the dual-encapsulated Sb architecture of Ti 3 C 2 T x and graphene; these effectively mitigate against volume expansion and the pulverization of Sb, offering good electrolyte penetration and rapid ionic/electronic transmission. Ti 3 C 2 T x also decreases the K + diffusion energy barrier, and the ultra-thick compact electrode ensures volumetric and areal performance. These findings provide a feasible strategy for fabricating ultra-thick, dense alloy-type electrodes to achieve high areal and volumetric capacity energy storage via highly-dense, dual-encapsulated architectures with conductive elastic networks.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
BIOCHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 3.475
Changsen Li,Xianxiu Li,Yang Liu,Yan Sun
Our previous study reported a novel protein ion-exchanger, N,N-dimethylaminopropyl acrylamide (DMAPAA)-grafted Sepharose FF, of very high protein adsorption capacity and uptake rate. To gain new insight into the polymer grafting effects on protein adsorption and chromatography, 18 DMAPAA-grafted anion exchangers of four grafting densities and various chain lengths (i.e., ionic capacities, ICs) were prepared and named as FF-Br x -pDMAPAA n ( x represents grafting density and n stands for IC in mmol/L). It was found that an optimal IC existed at each grafting density to present a maximal capacity. Of the four optimal-IC resins, FF-Br3-pDMAPAA587 showed the highest capacity (377 mg/mL), but the protein uptake rate, defined as the ratio of effective pore diffusivity to free diffusivity ( D e / D 0 ), was smaller than the resin of a similar ionic capacity but lower grafting density (FF-Br2-pDMAPAA592). Consequently, the dynamic binding capacity (DBC) of FF-Br2-pDMAPAA592 was higher than that of FF-Br3-pDMAPAA587 at flow velocities higher than 450 cm/h. Moreover, FF-Br3-pDMAPAA587 showed higher adsorption capacity than FF-Br2-pDMAPAA592 at 0−150 mmol/L NaCl, leading to its higher DBC values as compared to FF-Br2-pDMAPAA592 in the same salt concentration range. Taken together, DMAPAA-grafted resins of different grafting densities would be useful for purifying feedstocks of different ionic strengths.
研究领域:
生物化学
·
分离科学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2025
·
IF 17.1
Dong Wang,Hongmei Cao,Jiao Wang,Junhao Liu,Xuzhong Gong,Tao Qi,Zhi Wang
The preparation of LiNi x Co y Mn z O 2 (NCM) cathode through molten salt (MSs) reaction has great advantage in electrochemical performance due to its uniform and well-controlled reaction environment. However, the critical role of O 2- which acts as the essential reactant has never been considered. Here, homogeneous NCM523 cathode particles with low Li/Ni intermixing were synthesized in LiCl-containing molten salts, benefiting from the excellent O 2- dissolving capability of LiCl. The critical role of LiCl shows that it can either promote the uniform crystallization or leads to the collapse of the layered structure. Furthermore, by considering both O 2- solubility and low melting point, the prepared NCM523 cathode shows high specific capacity (173 mAh g −1 at 0.1 C, 4.3–2.8 V) and excellent capacity retention (96 % after 150 cycles at 1 C cycling). The NCM cathode preparing process in molten LiCl containing MSs shows both advance in thermodynamics and kinetics. This approach can also be successfully extended to other NCM cathode materials.
研究领域:
材料科学
·
电化学
·
储能
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Hanzhen Peng,Langlang Chen,Yifeng Wang,Bokai Cao,De Li,Yong Chen
As a graphite-like material, the LiBC can deliver a high capacity up to 500 mA h g–1 in Li-ion batteries, which is dependent on the carbon precursor, the high-temperature treatment, and the lithium insufficiency. However, the underlying mechanism is still not clear for the electrochemical reactions of LiBC. In this work, the pristine LiBC was reacted with aqueous solutions of different alkalinity, which was delithiated chemically and retained the layered structure. According to the XPS and NMR results, the B–B bond might be produced through the aqueous reaction or the initial charge process, which can be oxidized (charged) and reduced (discharged) in the electrochemical measurements. In the Li-ion battery, the reversible capacity of LiBC increases evidently with the alkalinity of aqueous solution and significantly rises to a similar value of ca. 285 mA h g–1 under 200 cycles. Therefore, the specific capacity of LiBC should be contributed by the active sites of B–B bonds, which can be significantly increased through the reaction with the hydroxyl ions, and this strategy might be adopted to activate more graphite-like materials.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Wenhui Tian,Penggang Ren,Xin Hou,Runzhuo Xue,Zhengyan Chen,Zhengzheng Guo,Yanlin Jin,Fang Ren
Preparing electrode material integrated with high gravimetric/volumetric capacitance and fast electron/ion transfer is crucial for the practical application. Owing to the structural contradiction, it is a big challenge to construct electrode material with high packing density, sufficient ion transport channels, and fast electronic transfer pathways. Herein, MnO 2 porous carbon composite with abundant porous structure and 3D carbon skeleton was facilely fabricated from Linum usitatissimum . L stems via NaOH activation and MnO 2 introduction. The in-situ introduced MnO 2 not only increases the packing density and the electrical conductivity of the porous carbon but also provides more active sites for oxidation reactions . These unique characteristics endow the resultant MnO 2 porous carbon composite with remarkable gravimetric capacitance of 549 F g −1 , volumetric capacitance of 378 F cm −3 , and capacitance retention of 54.9 %. Giving the simple process and low cost, this work might offer a new approach for structural design and the practical application of high-performance electrode materials.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Tao Liu,Dong-Qiang Lin,Qi-Ci Wu,Qi-Lei Zhang,Cun-Xiang Wang,Shan-Jing Yao
Hydrophobic charge-induction chromatography (HCIC) is a developing technology for antibody purification. To enhance the protein adsorption capacity, a novel polymer-grafted HCIC resin was developed, in which the surface-initiated activator generated by electron transfer (AGET) atom transfer radical polymerization (ATRP) was explored as a controlled polymerization technique to reconstruct matrix structure and ligand distribution. Using poly(glycidyl methacrylate, GMA) as grafting polymer and 2-mercapto-1-methyl-imidazole (MMI) as functional ligand, poly(GMA)-grafted HCIC resins were prepared with series of grafting and ligand densities. Adsorption behaviors of human immunoglobulin G (hIgG) on the prepared resins demonstrated the necessity of controlling grafting and ligand density. Saturated adsorption capacity ( Q m ) and effective pore diffusivity ( D e ) reached the maximum under medium ligand density when the grafting density was kept constant. The highest Q m and D e values were found under the highest grafting density, which were 73% and 7.17 times higher than the non-grafted resin, respectively. Column breakthrough tests indicated that the dynamic binding capacity of the resin with optimized grafting density and ligand density was up to 34.6 mg/g when linear velocity was 300 cm/h, which was 86.3% higher than dextran-grafted resin. The resin was then used to separate hIgG from a protein mixture (hIgG/human serum albumin = 1:4), high purity (>99%) and recovery (>90%) of hIgG were found with 50-cycle reuses, which verified the selectivity and robustness of G-MMI resin prepared. In general, the surface-initiated AGET ATRP provides a controlled grafting strategy to improve protein binding capacity for chromatographic separation, and new resins developed have great potential in large-scale protein purification applications.
研究领域:
生物化学
·
分离纯化技术
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2023
·
IF 5.3
Lu Qin,Jianjian Zhong,Jianling Li
A prominent topic in related fields is the search for cathode materials for aluminum-ion batteries (AIBs) with high specific capacity and outstanding cycle performance. MXenes, a two-dimensional layered material, can be used for a variety of energy storage purposes. However, their application in AIBs is hampered by poor capacity and significant self-accumulation. In this study, we employ a simple two-step process, first electrostatically adsorbing Cu2+ on MXenes and then in situ selenizing MXenes layers to produce TiSe2. The composite product F-Ti3C2Tx@Cu@TiSe2 exhibits an initial discharge specific capacity of 360.3 mAh g–1, and the capacity remains at 267.5 mAh g–1 after 100 cycles. In contrast, the directly selenized F-Ti3C2Tx@TiSe2 without Cu2+ shows a capacity of just 77.2 mAh g–1 after 100 cycles. This huge improvement is due to the fact that the electrostatic adsorption of Cu2+ on MXenes induces polarized sites with high electron density and optimizes the spatial structure of MXenes. This phenomenon effectively alleviates self-accumulation, providing a larger specific surface area and making it easier for [AlCl4]− to embed and escape. Through the X-ray photoelectron spectroscopy test and charge and discharge curves, it is found that the main capacity of the material comes from the redox reaction of [AlCl4]− and selenides in AIBs. Herein, the utilization of Cu2+ adsorbed MXenes as precursors followed by in situ selenization is innovative and also validates the great potential of Cu2+ adsorption in the field of electrochemistry.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2023
·Vol. 29
·期 12
·5267-5273
·
IF 2.8
Zhao Shiqi,Liu Jingxuan,Wu Xiang
At present, lithium-ion batteries are widely used in many aspects in mankind society, but considering the cost and safety factors, aqueous multivalent ion batteries are much suitable for large-scale applications. Among them, aqueous zinc ion batteries (AZIBs) possess the advantages of high safety, environmental friendliness and large theoretical capacity. In this work, we prepare VS 4 nanosheets as cathode electrodes for zinc-ion batteries. The assembled batteries achieve an excellent discharge capacity and rate performance in 3 M Zn (CF 3 SO 3 ) 2 electrolyte. It presents a reversible capacity of 225.43 mAh g −1 at 0.5 A g −1 . In addition, it still can maintain a capacity retention rate of 81% after 700 cycles at 5 A g −1 .
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Guiling Luo,Xiaowei Li,Linlin Chen,Yuning Zhang,Jun Gu,Yanhong Chao,Wenshuai Zhu,Zhichang Liu,Chunming Xu
Extracting lithium from salt lakes is an effective way to relieve the shortage of lithium resources. Electrochemical lithium extraction has attracted wide attention due to its high selectivity , eco-friendliness, and high-efficiency. Functional surface coating is an effective approach to improve the cycling performance, stability, and conductivity of the electroactive materials. In this work, LiMn 2 O 4 (LMO) electrode materials were prepared via sol–gel method with island-like CeO 2 coating (CeLMO) for lithium electrochemical adsorption from simulated brine. CeO 2 is helpful to inhibit the agglomeration of active metal oxides and promote the contact and electron transfer between metal oxides. Based on the results from X-ray diffraction, X-ray photoelectron, and Raman spectroscopy , the fate of lithium intercalation and deintercalation in CeLMO is illuminated. CeLMO-2//Ag electrochemical system can produce 96% pure Li + from Li 2 CO 3 precipitated mother liquor, and the adsorption capacity is 36.52 mg·g −1 . The capacity retention after 30 cycles was 60% at 50 mA·g −1 , and the Mn dissolution loss rate is 0.016%. In summary, island-like oxide coating improves electrochemical lithium adsorption efficiency and is a promising technology for producing battery-grade lithium products.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 15
·9593-9601
·
IF 12.732
Yan Zhao,Meng Zhang,Hong Yan,Yu Feng,Xinyu Zhang,Ruijie Guo
Since the original discovery, MXene can be synthesized by wet-chemical etching from the MAX phase. To avoid the shortcomings of the previous etchant, NaHF2 aqueous solution was used for the selective removal of Al from Ti3AlC2, while intercalating Na+ between layers. The d-spacing of the resulting accordion-like Ti3C2Tx is up to 12.35 Å; the by-product Na3AlF6 can be removed by H2SO4, and the product yield can reach about 85%. After a short time of centrifugation and sonication, few-layer (10–20 layers) Ti3C2Tx sheets in a large lateral size (3–4 μm) can be prepared, with high conductivity up to 2.3 × 105 S m−1. Ti3C2Tx can be stably dispersed in water and organic solvents for at least 96 h, and has excellent anti-thermal-oxidation ability. As the anode for sodium ion batteries, the Ti3C2Tx electrode delivers a high reversible capacity of 70 mA h g−1 after 900 cycles at a current density of 1 A g−1 with an extremely low-capacity decay rate. From 900 to 1000 cycles, the capacity can even be increased to 130 mA h g−1, and the Coulomb efficiency is close to 100%, showing that MXene can provide a stable structure for the Na+ cycle.
研究领域:
材料科学
·
电化学
·
储能技术
✓ 已验证
产品关联
DOI
高影响因子
THIN SOLID FILMS
·
2020
·
IF 2.03
Chaoqun Dong,Qiuxuan Ge,Yu Li,Jiawei Zhang
Electrode materials are crucial for the electrochemical performance of supercapacitors. Thus, it is urgent to develop a satisfactory electrode material with excellent energy storage properties. Binary metal hydroxides are competitive candidates for supercapacitors. Herein, we prepared honeycomb-like NiCo(OH) 2 nanosheet arrays grown on nickel foam by a facile one-step solvothermal method. The electrochemical performance of as-prepared honeycomb-like NiCo(OH) 2 nanosheet arrays as electrode materials for supercapacitor have been evaluated. The NiCo(OH) 2 electrode exhibits higher areal capacity (267 mF cm −2 ) compared with Ni(OH) 2 (31.2 mF cm −2 ) and Co(OH) 2 (87.73 mF cm −2 ) at the current density of 20 mA cm −2 . The capacity retention can up to 83.8% after 5000 cycles. Such intriguing electrochemical performance enables it to be a potential electrode material for supercapacitors.
研究领域:
材料科学
·
电化学
·
能量存储
✓ 已验证
产品关联
DOI
高影响因子
APPLIED THERMAL ENGINEERING
·
2016
·
IF 3.043
Aihong Du,Huiwen Yuan,Wei Liao,Haobo Zhou,Chunhua Lu,Zhongzi Xu
Cost-effective thermal energy storage materials are vital to the application of solar thermal power plants . One focus of this paper is improving thermal and mechanical properties of the thermal energy storage materials; the second focus lies in reducing the investment cost. On the basis of aluminate cementitious composites with 1 wt% nano-SiO 2 , 1 wt% nano-Cu and 15 wt% Cu powders, we introduced different wt% (0, 5, 10, and 15) of Fe powders to gradually replace 15 wt% Cu powders. The samples were heated at 105, 350, and 900 °C, respectively. As a result, when the content of Fe powders substitution was 10 wt%, volume heat capacity, thermal conductivity and compressive strength of the composites after heat-treatment at 900 °C were up to 2.38 MJ m −3 K −1 , 1.45 W m −1 K −1 , and 73.8 MPa respectively, which were 26.6%, 26.1%, and 24.0% higher than those of the composites with 15 wt% Cu powders. At the same time, the investment of the composites with 10 wt% Fe powders substitution was reduced almost 62.0%, compared with that of the composites with 15 wt% Cu powders. In addition, XRD and MIP were employed to characteristic the mineral phases and the pore structures of the aluminate cementitious composites, respectively.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）