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| 1 | Stratified-structural hydrogel incorporated with magnesium-ion-modified black phosphorus nanosheets for promoting neuro-vascularized bone regeneration显示文摘Angiogenesis and neurogenesis play irreplaceable roles in bone repair.Although biomaterial implantation that mimics native skeletal tissue is extensively studied,the nerve-vascular network reconstruction is neglected in the design of biomaterials.Our goal here is to establish a periosteum-simulating bilayer hydrogel and explore the efficiency of bone repair via enhancement of angiogenesis and neurogenesis.In this contribution,we designed a bilayer hydrogel platform incorporated with magnesium-ion-modified black phosphorus(BP)nanosheets for promoting neuro-vascularized bone regeneration.Specifically,we incorporated magnesium-ion-modified black phosphorus(BP@Mg)nanosheets into gelatin methacryloyl(GelMA)hydrogel to prepare the upper hydrogel,whereas the bottom hydrogel was designed as a double-network hydrogel system,consisting of two interpenetrating polymer networks composed of GelMA,PEGDA,andβ-TCP nanocrystals.The magnesium ion modification process was developed to enhance BP nanosheet stability and provide a sustained release platform for bioactive ions.Our results demonstrated that the upper layer of hydrogel provided a bionic periosteal structure,which significantly facilitated angiogenesis via induction of endothelial cell migration and presented multiple advantages for the upregulation of nerve-related protein expression in neural stem cells(NSCs).Moreover,the bottom layer of the hydrogel significantly promoted bone marrow mesenchymal stem cells(BMSCs)activity and osteogenic differentiation.We next employed the bilayer hydrogel structure to correct rat skull defects.Based on our radiological and histological examinations,the bilayer hydrogel scaffolds markedly enhanced early vascularization and neurogenesis,which prompted eventual bone regeneration and remodeling.Our current strategy paves way for designing nerve-vascular network biomaterials for bone regeneration. | Yan Xu Chao Xu Lei He Junjie Zhou Tianwu Chen Liu Ouyang Xiaodong Guo Yanzhen Qu Zhiqiang Luo Deyu Duan | 2022 | Bioactive Materials2022，7，10： | 5 |
| 2 | Controllable Preparation and Superior Rate Performance of Spinel LiMn2O4 Hollow Microspheresas Cathode Material for Lithium-ion Batteries显示文摘Spinel Li Mn_2O_4 microspheres and hollow microspheres with adjustable wall thickness have been prepared using controllable oxidation of Mn CO3 microspheres precursors and following solid reactions with lithium salts. Scanning electron microscopy(SEM) investigations demonstrate that the microsphere morphology and hollow structure of precursors are inherited. The effect of hollow structure properties of as-prepared Li Mn_2O_4 on their performance as cathode materials for lithium-ion batteries has been studied. Electrochemical performance tests show that Li Mn_2O_4 hollow microspheres with small wall thickness exhibit both superior rate capability and better cycle performance than Li Mn_2O_4 solid microspheres and Li Mn_2O_4 hollow microspheres with thick wall. The Li Mn_2O_4 hollow microspheres with thin wall have discharge capacity of 132.7 m A·h·g-1 at C/10(14.8 m A·g-1) in the first cycle, 94.1% capacity retention at C/10 after 40 cycles and discharge capacity of 116.5 m Ah·g-1 at a high rate of 5C. The apparent lithium-ion diffusion coefficient(Dapp) of as-prepared Li Mn_2O_4 determined by capacity intermittent titration technique(CITT) varies from 10-11 to 10-8.5 cm2·s-1 showing a regular 'W' shape curve plotted with test voltages. The Dapp of Li Mn_2O_4 hollow microspheres with thin wall has the largest value among all the prepared samples. Both the superior rate capability and cycle stability of Li Mn_2O_4 hollow microspheres with thin wall can be ascribed to the facile ion diffusion in the hollow structures and the robust of hollow structures during repeated cycling. | 王诗瑶 肖亮 guo yonglin deng bohua qu deyu xie zhizhong | 2016 | Journal of Wuhan University of Technology(Materials Science)2016，31，3： | 1 |
| 3 | Preparation and electrochemical lithium storage features of TiO 2 hollow spheres显示文摘 | Liang Xiao Minglei Cao Daidi Mei Yonglin Guo Lifeng Yao Deyu Qu Bohua Deng | 2013 | Journal of Power Sources2013，，： | 1 |
| 4 | Influence of particle sizes and morphologies on the electrochemical performances of spinel Li Mn2O4 cathode materials显示文摘 | Xiao Liang Guo Yonglin Qu Deyu | 2013 | Journal of Power Sources2013，225，： | 1 |
| 5 | Influence of particle sizes and morphologies on the electrochemical performances of spinel LiMn 2 O 4 cathode materials显示文摘 | Liang Xiao Yonglin Guo Deyu Qu Bohua Deng Hanxing Liu Daoping Tang | 2013 | Journal of Power Sources2013，，： | 1 |
| 6 | A New Perspective on the 5 V Discharge Capacity of Li/Al Doped Manganese Spinels显示文摘A series of manganese spinels LiMn2-yMeyO4 (Me = Li, Al, Mg) were prepared and examined by XRD and electrochemical methods. The spinels doped with Li or high content of Al can exhibit discharge capacity in the 5 V region, but spinels doped with Mg do not exhibit any 5 V discharge capacity. It is also observed that the 5 V discharge capacity of Li/Al doped spinels will be greatly suppressed once calcinated at temperatures above 900 ℃ in preparation. It is suggested that the 5 V discharge capacity of Li/Al doped spinels may be originated from the special chemical/structural characteristics of spinel phases containing Li or high content of Al prepared at temperatures below 900 ℃. | 李全华 WANG Yong QU Deyu XIAO Liang 邓伯华 CHENG JinShu | 2013 | Journal of Wuhan University of Technology(Materials Science)2013，28，1： | 0 |
| 7 | Thermal Stability and Electrochemical Properties of Separators for Lithium-ion Batteries显示文摘The mechanical properties,contact angle,thermomechanical and electrochemical properties of PE,PVDF,and ceramic separators were compared.The experimental results show that the PE separator has the largest porosity,the PVDF separator has the best mechanical properties,wettability,and heat resistance.Three kinds of separators were assembled into lithium-ion batteries for electrochemical tests.Among them,the PE separator has the best rate performance,and the ceramic separator has poor performance in charge-discharge cycles.At the same time,the PE and ceramic separators were tested with different amounts of electrolytes at room temperature and a high temperature,and it is found that the capacity of the PE separator is higher at room temperature,while the performance of the ceramic separator is better at a high temperature.The amount of electrolyte also has a certain influence on its electrochemical performance. | YI Guangyuan XU Caiyun LIU Wan QU Deyu WANG Hongbing TANG Haolin | 2023 | Journal of Wuhan University of Technology(Materials Science)2023，38，6： | 0 |
| 8 | Mixed ion-electron conducting Li_(3)P for efficient cathode prelithiation of all-solid-state Li-ion batteries显示文摘All-solid-state batteries(ASSBs)using sulfide electrolytes hold promise for next-generation battery technology.Although using a pure Li metal anode is believed to maximize battery energy density,numerous recent studies have implicated that Li-ion anodes(e.g.,graphite and Si)are more realistic candidates due to their interfacial compatibility with sulfide electrolytes.However,those Li-ion ASSBs suffer from an issue similar to liquid Li-ion batteries,which is a loss of active Li inventory owing to interfacial side reactions between electrode components,resulting in reduced available capacities and shortened cycle life.Herein,for the first time,we explore the potential of Li_(3)P for cathode prelithiation of Li-ion ASSBs.We identify that the crystallized Li_(3)P(c-Li_(3)P)has room-temperature ionic and electronic conductivities of both over 1o-4 s/cm.Such a mixed ion-electron conduct-ing feature ensures that the neat c-LisP affords a high Li+-releasing capacity of 983 mAh/g in ASSBs during the first charging.Moreover,the electro-chemical delithiation of c-LisP takes place below 2 V versus Li+/Li,while its lithiation dominates below 1 V versus Lit/Li.Once used as a cathode prelithiation regent for ASSBs,c-Li_(3)P only functions as a Li+donor without lithiation activity and can adequately compensate for the Li loss with minimal dosage added.Besides mitigating first-cycle Li loss,c-LisP prelithiation can also improve the battery cyclability by sustained release of low-dosage Li+ions in subsequent cycles,which have been embodied in several full ASSBs by coupling a LiCoO2 cathode with various types of anodes(including graphite,in foil,Sb,and Si anode).Our work provides a universal cathode prelithiation strategy for high-efficiency Li-ion AsSBs. | Jing Li Dan Liu Han Sun Deyu Qu Zhizhong Xie Haolin Tang Jinping Liu | 2023 | SmartMat2023，4，5： | 0 |
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