In the field of tissue engineering,there is significant subsidence of the porous design scaffold several months after implantation.To avoid stress shielding and stimulate bone and cartilage ingrowth,high scaffold poro...In the field of tissue engineering,there is significant subsidence of the porous design scaffold several months after implantation.To avoid stress shielding and stimulate bone and cartilage ingrowth,high scaffold porosity is needed to diminish the mechanical properties of the scaffold.The closer the mechanical properties of the scaffold are to those of surrounding tissues,the better biological properties it will get.Besides,adequate mechanical stability is needed as the scaffold needs to be well fixed in the target area and it will endure load after surgery.Evaluating the mechanical fixation of the scaffold at the initial stage and the long-term performance of a scaffold for in vivo study is hard,as no facility can be put into the target area for the friction test.This study investigated the mechanical stability of the biomimetic scaffold at the initial stage of implantation by finite element analysis(FEA).According to in vivo study,scaffold could not maintain its original position and would sink 1-2 mm in the target area.The simulation results suggested that mechanical loading is not the main reason for scaffold subsidence.展开更多
Although lithium-sulfur batteries are considered one of the most potential next-generation energy storage systems owing to their high-energy density, the dissolution and shuttle of intermediate lithium polysulfides pr...Although lithium-sulfur batteries are considered one of the most potential next-generation energy storage systems owing to their high-energy density, the dissolution and shuttle of intermediate lithium polysulfides primarily limit their commercial applications. Currently, the search for new materials for high-performance lithium-sulfur batteries has become a global research hotspot.MXenes, two dimensional inorganic compound comprising several layers of transition metal carbide, nitride, or car-bonitride,are actively investigated owing to their large specific surface area, good conductivity, and excellent cycle and rate performance.This article firstly reviews the breakthrough of MXenes in lithium-sulfur batteries, introduces the preparation methods and structural characteristics, and summarizes the specific applications and modification mechanisms in lithium-sulfur batteries.Then, the characteristics and advantages of MXenes as a composite electrode material for lithium-sulfur batteries are highlighted. Finally, the potential in future commercial applications is summarized.展开更多
基金financially supported by Versus Arthritis Research UK (No.21977)European Commission via a H2020-MSCA-RISE Programme (BAMOS,No.734156)+2 种基金Innovative UK via Newton Fund (No.102872)Engineering and Physical Science Research Council (EPSRC) via DTP CASE Programme (No.EP/T517793/1)the Intergovernmental Cooperation in Science and Technology of China (No.2016YFE0125300)
文摘In the field of tissue engineering,there is significant subsidence of the porous design scaffold several months after implantation.To avoid stress shielding and stimulate bone and cartilage ingrowth,high scaffold porosity is needed to diminish the mechanical properties of the scaffold.The closer the mechanical properties of the scaffold are to those of surrounding tissues,the better biological properties it will get.Besides,adequate mechanical stability is needed as the scaffold needs to be well fixed in the target area and it will endure load after surgery.Evaluating the mechanical fixation of the scaffold at the initial stage and the long-term performance of a scaffold for in vivo study is hard,as no facility can be put into the target area for the friction test.This study investigated the mechanical stability of the biomimetic scaffold at the initial stage of implantation by finite element analysis(FEA).According to in vivo study,scaffold could not maintain its original position and would sink 1-2 mm in the target area.The simulation results suggested that mechanical loading is not the main reason for scaffold subsidence.
基金supported by the Natural Science Foundation of Yunnan Province (Grant No. 202001AU070079)the National Natural Science Foundation of China (Grant No. 202101AW070006)+1 种基金the Basic Research Plan (Key Project) of Yunnan Province (Grant No. 202101BE070001-003)the University-level Project of Panzhihua College (Grant No.035000292)
文摘Although lithium-sulfur batteries are considered one of the most potential next-generation energy storage systems owing to their high-energy density, the dissolution and shuttle of intermediate lithium polysulfides primarily limit their commercial applications. Currently, the search for new materials for high-performance lithium-sulfur batteries has become a global research hotspot.MXenes, two dimensional inorganic compound comprising several layers of transition metal carbide, nitride, or car-bonitride,are actively investigated owing to their large specific surface area, good conductivity, and excellent cycle and rate performance.This article firstly reviews the breakthrough of MXenes in lithium-sulfur batteries, introduces the preparation methods and structural characteristics, and summarizes the specific applications and modification mechanisms in lithium-sulfur batteries.Then, the characteristics and advantages of MXenes as a composite electrode material for lithium-sulfur batteries are highlighted. Finally, the potential in future commercial applications is summarized.
