Frontiers of Materials Science
·
2024
·Vol. 18
·期 2
·1-12
·
IF 2.5
Liang Xinghua,Shen Pengcheng,Lan Lingxiao,Qin Yunmei,Yan Ge,Huang Meihong,Lu Xuanan,Hun Qiankun,Wang Yujiang,Wang Jixuan
Electrolyte interface resistance and low ionic conductivity are essential issues for commercializing solid-state lithium metal batteries (SSLMBs). This work details the fabrication of a double-layer solid composite electrolyte (DLSCE) for SSLMBs. The composite comprises poly(vinylidene fluoride- co -hexafluoropropylene) (PVDF–HFP) and poly(methyl methacrylate) (PMMA) combined with 10 wt.% of Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO), synthesized through an ultraviolet curing process. The ionic conductivity of the DLSCE (2.6 × 10 −4 S·cm −1 ) at room temperature is the high lithium-ion transference number (0.57), and the tensile strength is 17.8 MPa. When this DLSCE was assembled, the resulted LFP/DLSCE/Li battery exhibited excellent rate performance, with the discharge specific capacities of 162.4, 146.9, 93.6, and 64.0 mA·h·g −1 at 0.1, 0.2, 0.5, and 1 C, respectively. Furthermore, the DLSCE demonstrates remarkable stability with lithium metal batteries, facilitating the stable operation of a Li/Li symmetric battery for over 200 h at both 0.1 and 0.2 mA·cm −2 . Notably, the formation of lithium dendrites is also effectively inhibited during cycling. This work provides a novel design strategy and preparation method for solid composite electrolytes.
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Science China-Chemistry
·
2020
·Vol. 63
·期 9
·1306-1314
·
IF 6.356
Xie Huanyu,Hao Qing,Jin Hongchang,Xie Shuai,Sun Zhaowei,Ye Yadong,Zhang Chaohui,Wang Dong,Ji Hengxing,Wan Li-Jun
Because of its high theoretical specific capacity and low reduction potential, Li metal is considered to be key to reaching high energy density in rechargeable batteries. In this context, most of the research has focused on suppressing dendrite formation during Li deposition to improve the cycling reversibility and safety of the batteries. Here, covalent organic framework (COF) film coating on a commercial polypropylene separator is applied as an ion redistributor to eliminate Li dendrites. The COF crystallites consist of ordered nanochannels that hinder the movement of anions while allowing Li-ions to transport across, leading to a high Li-ion transference number of 0.77±0.01. The transport of Li-ions across the COF film can be considered to be analogous to beads passing through a Galton Board, a model that demonstrates a statistical concept of a normal distribution. Thus, an even distribution of Li-ions is obtained at the COF Li metal interface. The controlled Li-ion flux yields a smooth Li metal surface after 1,000 h (500 times) of cycling, leading to a significantly improved cycling stability and reversibility, as demonstrated by Cu||Li half cells, Li||Li symmetric cells, and LiFePO 4 ||Li full cells. These results suggest that, following the principle of a Galton Board, nanopore insulators such as COF-based materials are effective ion distributors for the different energy storage or conversion systems.
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Science China-Materials
·
2024
·
IF 6.8
Zhao Lu,Zhang Feng,Gao Shoujian,Jin Jian
Fabricating nanoporous membranes with superhydrophilic properties to overcome fouling from organic foulants is a challenge in membrane separation processes for organic molecules. Recently, researchers demonstrated that membranes with distinct hydrogel features exhibit superhydrophilicity and outstanding antifouling capacity. However, hydrogel membranes have low mechanical strength, which can lead to pore deformation and potential membrane rupture during pressure-driven separation processes. Herein, we report a whole-membrane crosslinking strategy to fabricate a superhydrophilic and robust nanoporous membrane in which polyethyleneimine is blended and crosslinked in a carboxylated polyacrylonitrile hydrogel membrane in situ . Whole-membrane crosslinking improves membrane strength, with crosslinking occurring both in the membrane interior and on the membrane surface. Efficient molecular separation with a water flux of 220 L m −2 h −1 bar −1 , a Coomassie brilliant blue (CBB) rejection of ∼99.9%, and a CBB/Na 2 SO 4 selectivity of 747 was achieved with this membrane. The membrane also showed excellent antifouling capacity, with a flux recovery of ∼100% during molecular separation with humic acid as a foulant. At transmembrane pressures up to 8 bar, the membrane exhibited stable molecular separation. Our work provides a new route for fabricating superhydrophilic nanoporous membranes for the separation of organic molecules in wastewater.
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Science China-Technological Sciences
·
2021
·Vol. 64
·期 8
·1752-1764
·
IF 3.572
Wang QiLin,Zhu Lin,Wei DanDan,Sun Huan,Tang Chen,Liu Zhao,Li Ke,Yang Jia,Qin Gang,Sun GengZhi,Chen Qiang
In this work, semi-crystalline nanocomposite hydrogels (i.e., PAAmA 11 A/GO gels) were synthesized by micellar copolymerization of acrylamide and N -acryloyl-11-aminoundecanoic acid (A 11 A) in the presence of a large amount of sodium dodecyl sulfonate (SDS) micelles and GO nanosheets. The resulting hydrogels (SMHs) not only demonstrated high strength and high toughness, but also exhibited good shape memory property. Because of near-infrared (NIR) light absorbability of GO nanosheets, shape recovery and shape of PAAmA 11 A/GO gels could be tuned by NIR irradiation. Moreover, bilayer hydrogels and trilayer hydrogels were also fabricated by the integration of shape-memorized PAAmA 11 A/GO gel and elastic hydrophobic associated hydrogel (E-gel). Based on the NIR-responsive shape memory property and layered structure, shape deformation of bilayer hydrogels and trilayer hydrogels was rather different from the single PAAmA 11 A/GO gel. Each kind of gel structure exhibited diverse and complex shapes via programmable NIR irradiation. More importantly, the shape morphing of NIR-SMHs-based hydrogels could mimic the hand and flower and be used as actuators.
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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2021
·Vol. 37
·期 3
·512-521
·
IF 1.307
Cao Wenhao,Wang Caifeng,Wang Shuai,Zhang Yang,Zhao Ruisheng
I n view of the current living micro-environment and requirements of green economy, intelligent light-responsive humidification materials have become a hot spot in intelligent polymer materials. In this work, reversible photoresponsive films with a mechanical stability and an excellent humidity adjustment performance are developed by modifying epoxy-ether-spiropyran(EPESP) on amino-nanofibers(PAN-NH 2 ), which was produced through electrospinning. Such smart films for regulating wettability and micro-environment humidity can be reversibly manipulated by the simple switch of UV and visible light irradiation because of the unique transformation between polar ring-opened status and nonpolar ring-closed status of the spiropyran units. The effects of EPESP modification amount on the morphology, wettability, tensile strength and the ability to regulate humidity were investigated in detail. The results show that with the increase of modification amount of EPESP, both the humidity regulation and tensile strength increased; when the modification amount exceeds 7 mg, the range of regulating humidity increases slowly.
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JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 21
·9014-9026
·
IF 3.553
Hu Xiaoran,Hu Ying,Guo Zhen,Liu Shuai,Zhang Qian,Zhang Xiaokun,Xiang Yong
In this paper, a direct alternating current hybrid generator is proposed through the combination of piezoelectric hydroxyapatite (HA)/polylactide (PLLA) composite film with a graphene/silicon dynamic Schottky diode. The proposed hybrid generator provides an overall energy conversion efficiency of 65% under a single mechanical force. This percentage marks the highest efficiency compared with previously reported piezoelectric generators and dynamic Schottky diode generators. The primary mechanisms of the proposed generator are the built-in electric field separation of the diffusion of carriers in the moving Schottky diode, and the synergistic effect of the hydrogen bond and dipole interactions between HA and PLLA for the direct and alternating part of the proposed HA/PLLA/graphene/silicon hybrid generator, respectively. Moreover, the hybrid generator provides a maximum output voltage of 4.7 V for the alternating output and current of 2.9 μA for the direct output, which can simultaneously illuminate several LEDs. Thus, the proposed generator shows great potential in practical applications for converting mechanical energy for self-powered systems or wearable energy sources.
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IONICS
·
2024
·Vol. 30
·期 7
·4155-4162
·
IF 2.4
Wei Feng,Liu Qingyun,Zhang Jiadong,Ren Ziquan,Zhang Linlin
As a by-product of coal chemical industry, it is very suitable to be used as carbon precursor to prepare carbon materials because of its rich aromatic hydrocarbons. However, the preparation of carbon materials often uses a lot of metal oxides and strong alkali, which will not only cause corrosion to the equipment, but also produce wastewater. Herein, the mixture of bicarbonate and hydrogen oxalate was used as template and activator to synthesize porous carbon nanosheets, which presents high specific surface area of 784.8 m 2 g −1 and multiple ion transport channels. Due to those merits, the PCNS 2 cathode displays superior zinc ion storage performance, such as high specific capacity of 210.1 F g −1 , excellent energy density and power output of 83.3 Wh kg −1 and 17.2 kW kg −1 and long cycle life with capacity retention of 98.57% after 11,000 cycles. This work provides an avenue to prepare porous carbon nanosheets for energy storage devices.
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Journal of Food Measurement and Characterization
·
2022
·Vol. 16
·期 3
·1974-1982
·
IF 3.006
Jiang Xin-Yu,Yan Jia-Nan,Du Yi-Nan,Xu Shi-Qi,Han Jia-Run,Wu Hai-Tao
The gel properties of scallop ( Patinopecten yessoensis ) male gonad hydrolysates (SMGHs) combined with different concentrations of iota-carrageenan ( ι -C) were studied. SMGHs at 5% ( w / v ) were dispersed in 0.26%, 0.56% and 1.25% ι -C solution, respectively. The storage modulus value of SMGHs/ ι -C increased with the increasing of ι -C concentration and reached 1392.7 Pa for 1.25% ι -C at 0.1 Hz, which was almost 116-fold greater than that of SMGHs. SMGHs combined with different concentrations of ι -C exhibited thermoreversible gel properties with melting and gelling temperatures of 40.2–51.3 °C and 30.6–33.9 °C, respectively. Non-destructive testing of gel samples by low-field nuclear magnetic resonance showed that the degree of water trapping in SMGHs/ ι -C was in a ι -C concentration-dependent manner. SMGHs/ ι -C showed three-dimensional network structures with a tendency toward denser with increasing of ι -C concentration. The improved gelation by the combination of SMGHs and ι -C as well as controlling the concentration of ι -C can provide information for potential application in food formulation.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 24
·19477-19489
·
IF 2.779
Zhao Jianwen,Dong Jun,Zhou Jian,Wang Linsheng
White light-emitting diodes (WLEDs) are of paramount importance in the development of lighting and display in replace of inefficient fluorescence as well as incandescent lamps. In this work, Tb 3+ , and Tm 3+ were both introduced into a novel phosphate host Ca 9 Nd(PO 4 ) 7 . The X-ray diffraction (XRD) analyses make sure that the materials have been synthesized successfully. Further XRD Rietveld refinements were used to shed light on the site preference and the variations of crystal lattice parameters. Strong blue light emission was observed after careful optimization of the doping concentration. Theoretical computation on the basis of density functional theory checks the reliability of the phosphate host for doping luminescent centers. At last, a near-ultraviolet commercial LED chip was used with these materials to make a prototype WLED device. They possess a highly stable warm white light emission upon various driving currents (color temperature is constant 4000 K). The work has shown intriguing prospects of Ca 9 Nd(PO 4 ) 7 : Tm 3+ , Tb 3+ in lighting and display applications.
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Nature Communications
·
2020
·Vol. 11
·期 1
·1-9
·
IF 12.121
Yin Yi-Chen,Wang Qian,Yang Jing-Tian,Li Feng,Zhang Guozhen,Jiang Chen-Hui,Mo Hong-Sheng,Yao Ji-Song,Wang Kun-Hua,Zhou Fei,Ju Huan-Xin,Yao Hong-Bin
Fabricating a robust interfacial layer on the lithium metal anode to isolate it from liquid electrolyte is vital to restrain the rapid degradation of a lithium metal battery. Here, we report that the solution-processed metal chloride perovskite thin film can be coated onto the lithium metal surface as a robust interfacial layer to shield the lithium metal from liquid electrolyte. Via phase analysis and density functional theory calculations, we demonstrate that the perovskite layer can allow fast lithium ion shuttle under a low energy barrier of 0.45 eV without the collapse of framework. Such perovskite modification can realize stable cycling of LiCoO 2 |Li cells with an areal capacity of 2.8 mAh cm −2 using thin lithium metal foil (50 μm) and limited electrolyte (20 μl mAh −1 ) for over 100 cycles at 0.5 C. The metal chloride perovskite protection strategy could open a promising avenue for advanced lithium metal batteries.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2022
·Vol. 26
·期 4
·917-927
·
IF 2.747
Zhang Lang,Chang Shiying,Lu Xingjie,Han Tao,Jin Ruoheng,Zhao Tenglong,Fang Dong,xie Ming,Wang Mingjun,Yi Jianhong
Vanadate-based synthesis of battery electrodes has become a topic of research interest due to the high lithium storage performance. However, the rapid capacity decay seriously hinders its practical application. In order to improve the potential for Co 3 V 2 O 8 (CVO) as an electrode in lithium batteries, a Na 5 V 12 O 32 nanowire precursor with a smooth surface was obtained using the hydrothermal method. Next, the CVO nanowires assembled by nanosheets were fabricated by cation exchange from the Na 5 V 12 O 32 precursor. Finally, the elemental phosphorus-coated CVO was successfully synthesized by a custom furnace. The characterization of X-ray diffraction (XRD) and inductively coupled plasma emission spectroscopy (ICP-ES) quantified the ratio of P and CVO, and Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) revealed the presence and coverage. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) further demonstrated the existence and morphology of P and CVO. Meanwhile, electrochemical measurements illustrated the stable lithium storage and notable rate performance of the P-CVO electrode as compared to AN-CVO. The P-CVO electrode holds a higher stable cycle performance after 190 cycles, with discharge specific capacity of 415.3 mA h g −1 and capacity retention of 97% at a current density of 1.0 A g −1 (872 mA h g −1 , 2.0 A g −1 , 98.8%), versus AN-CVO with 320.6 mA h g −1 (capacity retention of 79.5%) after only 100 cycles. Thence, the synthetic strategy provides a potential solution to enhance the stability of electrodes for high-performance lithium-ion batteries.
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JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 5
·2191-2203
·
IF 3.5
Guo Shuchang,Bo Caiying,Hu Lihong,Zhang Meng,Zhou Yonghong,Yang Xiaohui,Feng Guodong,Jia Puyou,Li Shouhai
The utilization of renewable biomass resources to develop multifunctional UV-curable coatings is crucial for sustainable development, environmental protection, and green chemistry, particularly for thermosetting materials, which are extensively utilized in practical applications. This study presents the synthesis of a novel, repairable, robust, shape memory, biobased UV-curable polymer derived from renewable cardanol by utilizing dynamic dioxaborolane bonds. This UV-curable polymer, which is prepared by the copolymerization of cardanol-based polyol acrylate containing dioxaborolane and castor oil-based polyurethane acrylate (CPolA-B/COUPA), has a maximum tensile strength of 23.52 MPa. The UV-curable polymer showed a 100% healing efficiency at 50% RH, and the temporary polymer shape can revert to its initial shape when subjected to various stimuli, such as heat, microwave, and IR radiation. In addition, this UV-curable polymer exhibited multicolor emission properties. This study offers a new perspective for designing biomass-derived UV-curable polymers with excellent mechanical and desirable attributes, such as shape memory, self-healing, and adjustable fluorescence properties.
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