Spinel-type cathodes are considered an optimal substitute for conventional layered oxide cathodes owing to their use of inexpensive and earth-abundant manganese as the redox-active element.Moreover,the introduction of...Spinel-type cathodes are considered an optimal substitute for conventional layered oxide cathodes owing to their use of inexpensive and earth-abundant manganese as the redox-active element.Moreover,the introduction of cation disorder can effectively suppress the detrimental two-phase reaction to realize high capacities in a wide voltage range.However,the continuous capacity decay during cycles has hindered the widespread application of these cathode materials.Inorganic fluorides exhibit excellent electrochemical stability at high voltage;therefore,in this study,the direct F2 gas reaction with a partially disordered spinel cathode(Li_(1.6)Mn_(1.6)O_(3.7)F_(0.3,)LMOF1.6)was initially applied to investigate the impacts of fluorination on the surface structure and electrochemical performances.The inorganic fluorinated layer,mainly containing LiF,was distributed uniformly on the surface of LMOF1.6nanoparticles after fluorination for an appropriate time without the turbulence caused by the valency of manganese cation,which improved the capacity retention and rate capability by the suppression of structural damage,parasitic reaction,and cation dissolution.The LMOF1.6cathode fluorinated for 0.5 h exhibited a capacity of283.6 mAh·g^(-1)at 50 mA·g^(-1)and an enhanced capacity retention of 29.6%after 50 cycles in the voltage range of1.5-4.8 V,as compared to the pristine LMOF1.6 with only27.9%capacity retention.展开更多
目的观察头穴长留针配合下肢CPM康复器治疗痉挛性脑性瘫痪的临床疗效及其对患者肌张力、平衡能力和脑血流的影响。方法将100例痉挛性脑性瘫痪患者随机分为观察组52例和对照组48例。观察组采用头穴长留针配合下肢CPM康复器治疗,对照组仅...目的观察头穴长留针配合下肢CPM康复器治疗痉挛性脑性瘫痪的临床疗效及其对患者肌张力、平衡能力和脑血流的影响。方法将100例痉挛性脑性瘫痪患者随机分为观察组52例和对照组48例。观察组采用头穴长留针配合下肢CPM康复器治疗,对照组仅采用下肢CPM康复器治疗。观察两组治疗前后肌张力[改良Ashworth分级量表(modified Ashworth scale,MAS)评分]、平衡能力[Berg平衡量表(Berg balance scale,BBS)评分]、各项脑血流指标[大脑前动脉(anterior cerebral artery,ACA)、中动脉(middle cerebral artery,MCA)和后动脉(posterior cerebral artery,PCA)平均血流速度]、粗大运动功能量表(gross motor function measure,GMFM)评分(D区和E区)及儿科生活质量量表(the pediatric quality of life inventory,PedsQL)评分的变化情况,并比较两组临床疗效。结果两组治疗后MAS评分均较同组治疗前显著降低,BBS评分、各项脑血流指标、GMFM中D区和E区评分及PedsQL评分均显著升高,差异均具有统计学意义(P<0.05)。观察组治疗后MAS评分明显低于对照组,BBS评分、各项脑血流指标、GMFM中D区和E区评分及PedsQL评分明显高于对照组,差异均具有统计学意义(P<0.05)。观察组总有效率为92.3%,明显高于对照组的70.8%(P<0.05)。结论头穴长留针配合下肢CPM康复器治疗痉挛性脑性瘫痪疗效确切,能有效降低患者肌张力,提高平衡力,加快脑血流速度,改善运动功能和生活质量。展开更多
基金financially supported by the National Key R and D Program of China(No.2022YFB3805702)State Key Program of the National Natural Science Foundation of China(No.52130303)+1 种基金National Natural Science Foundation of China(Nos.51973152,51973119,5210309352173078)。
文摘Spinel-type cathodes are considered an optimal substitute for conventional layered oxide cathodes owing to their use of inexpensive and earth-abundant manganese as the redox-active element.Moreover,the introduction of cation disorder can effectively suppress the detrimental two-phase reaction to realize high capacities in a wide voltage range.However,the continuous capacity decay during cycles has hindered the widespread application of these cathode materials.Inorganic fluorides exhibit excellent electrochemical stability at high voltage;therefore,in this study,the direct F2 gas reaction with a partially disordered spinel cathode(Li_(1.6)Mn_(1.6)O_(3.7)F_(0.3,)LMOF1.6)was initially applied to investigate the impacts of fluorination on the surface structure and electrochemical performances.The inorganic fluorinated layer,mainly containing LiF,was distributed uniformly on the surface of LMOF1.6nanoparticles after fluorination for an appropriate time without the turbulence caused by the valency of manganese cation,which improved the capacity retention and rate capability by the suppression of structural damage,parasitic reaction,and cation dissolution.The LMOF1.6cathode fluorinated for 0.5 h exhibited a capacity of283.6 mAh·g^(-1)at 50 mA·g^(-1)and an enhanced capacity retention of 29.6%after 50 cycles in the voltage range of1.5-4.8 V,as compared to the pristine LMOF1.6 with only27.9%capacity retention.
文摘目的观察头穴长留针配合下肢CPM康复器治疗痉挛性脑性瘫痪的临床疗效及其对患者肌张力、平衡能力和脑血流的影响。方法将100例痉挛性脑性瘫痪患者随机分为观察组52例和对照组48例。观察组采用头穴长留针配合下肢CPM康复器治疗,对照组仅采用下肢CPM康复器治疗。观察两组治疗前后肌张力[改良Ashworth分级量表(modified Ashworth scale,MAS)评分]、平衡能力[Berg平衡量表(Berg balance scale,BBS)评分]、各项脑血流指标[大脑前动脉(anterior cerebral artery,ACA)、中动脉(middle cerebral artery,MCA)和后动脉(posterior cerebral artery,PCA)平均血流速度]、粗大运动功能量表(gross motor function measure,GMFM)评分(D区和E区)及儿科生活质量量表(the pediatric quality of life inventory,PedsQL)评分的变化情况,并比较两组临床疗效。结果两组治疗后MAS评分均较同组治疗前显著降低,BBS评分、各项脑血流指标、GMFM中D区和E区评分及PedsQL评分均显著升高,差异均具有统计学意义(P<0.05)。观察组治疗后MAS评分明显低于对照组,BBS评分、各项脑血流指标、GMFM中D区和E区评分及PedsQL评分明显高于对照组,差异均具有统计学意义(P<0.05)。观察组总有效率为92.3%,明显高于对照组的70.8%(P<0.05)。结论头穴长留针配合下肢CPM康复器治疗痉挛性脑性瘫痪疗效确切,能有效降低患者肌张力,提高平衡力,加快脑血流速度,改善运动功能和生活质量。
