Shuttle effect,poor conductivity and large volume expansion are the main factors that hinder the practical application of sulfur cathodes.Currently,rational structure designing of carbon-based sulfur hosts is the most...Shuttle effect,poor conductivity and large volume expansion are the main factors that hinder the practical application of sulfur cathodes.Currently,rational structure designing of carbon-based sulfur hosts is the most effective strategy to address the above issues.However,the preparation process of carbon-based sulfur hosts is usually complex and costly.Therefore,it is necessary to develop an efficient and cost-effective method to fabricate carbon hosts for high-performance sulfur cathodes.Herein,we reported the fabrication of a bio-derived nitrogen doped porous carbon materials(BNPC)via a molten-salt method for high performance sulfur cathodes.The long-range-ordered honeycomb structure of BNPC is favorable for the trapping of polysulfide(PS)species and accommodates the volumetric variation of sulfur during cycling,while the high graphitization degree of BNPC favors the redox kinetics of sulfur cathodes.Moreover,the nitrogen doping content not only enhances the electrical conductivity of BNPC,but also provides ample anchoring sites for the immobilization of PS,which plays a key role in suppressing the shuttle effect.As a result,the S@BNPC cathode exhibits a high initial specific capacity of 1189.4 mA·h/g at 0.2C.After 300 cycles,S@BNPC still maintains a capacity of 703.2 mA·h/g which corresponds to a fading rate of 0.13%per cycle after the second cycle.This work offers vast opportunities for the large-scale application of high performance carbon-based sulfur hosts.展开更多
目的脑卒中幸存患者中70%~80%留有不同程度的残疾,严重影响生活质量。本研究分析脑梗死患者社区康复运动应用效果。方法选取2017-01-01-2018-12-31深圳市蛇口人民医院出院的脑梗死患者180例,按康复治疗方案不同分为观察组与对照组,每组9...目的脑卒中幸存患者中70%~80%留有不同程度的残疾,严重影响生活质量。本研究分析脑梗死患者社区康复运动应用效果。方法选取2017-01-01-2018-12-31深圳市蛇口人民医院出院的脑梗死患者180例,按康复治疗方案不同分为观察组与对照组,每组90例。观察组以弹力带、Bobath球、平衡垫、瑜伽垫等器材,制定标准化运动方案,组织患者进行以运动功能为主、兼顾平衡与柔韧性的社区康复运动;对照组仅根据指导与随访自行锻炼。两组分别于康复前及康复3个月后,进行肌力耐力、关节活动度、肌张力、偏瘫运动功能、步行能力、平衡功能和日常生活活动能力(activity of daily living,ADL)评估,以评价两组患者干预效果。结果干预3个月后,观察组肌力得分为(4.51±0.60)分,高于对照组的(3.63±0.64)分,t=9.431,P<0.001;关节活动度得分为(3.60±0.49)分,高于对照组的(2.93±0.44)分,t=9.530,P<0.001;肌张力得分为(0.34±0.56)分,低于对照组的(1.37±0.79)分,t=-10.029,P<0.001;偏瘫运动功能得分为(5.27±0.76)分,高于对照组的(3.63±0.64)分,t=15.539,P<0.001;步行能力得分为(4.04±1.22)分,高于对照组的(2.21±1.13)分,t=10.444,P<0.001;平衡功能得分为(4.27±1.07)分,高于对照组的(3.02±1.57)分,t=6.211,P<0.001;ADL得分为(85.44±19.90)分,高于对照组的(57.28±25.32)分,t=8.298,P<0.001。结论社区康复运动可有效恢复脑梗死患者运动能力和生活能力。展开更多
基金Project(2018YFB0104300)supported by the National Key R&D Program of ChinaProject(51774150)supported by the National Natural Science Foundation of China
文摘Shuttle effect,poor conductivity and large volume expansion are the main factors that hinder the practical application of sulfur cathodes.Currently,rational structure designing of carbon-based sulfur hosts is the most effective strategy to address the above issues.However,the preparation process of carbon-based sulfur hosts is usually complex and costly.Therefore,it is necessary to develop an efficient and cost-effective method to fabricate carbon hosts for high-performance sulfur cathodes.Herein,we reported the fabrication of a bio-derived nitrogen doped porous carbon materials(BNPC)via a molten-salt method for high performance sulfur cathodes.The long-range-ordered honeycomb structure of BNPC is favorable for the trapping of polysulfide(PS)species and accommodates the volumetric variation of sulfur during cycling,while the high graphitization degree of BNPC favors the redox kinetics of sulfur cathodes.Moreover,the nitrogen doping content not only enhances the electrical conductivity of BNPC,but also provides ample anchoring sites for the immobilization of PS,which plays a key role in suppressing the shuttle effect.As a result,the S@BNPC cathode exhibits a high initial specific capacity of 1189.4 mA·h/g at 0.2C.After 300 cycles,S@BNPC still maintains a capacity of 703.2 mA·h/g which corresponds to a fading rate of 0.13%per cycle after the second cycle.This work offers vast opportunities for the large-scale application of high performance carbon-based sulfur hosts.
文摘目的脑卒中幸存患者中70%~80%留有不同程度的残疾,严重影响生活质量。本研究分析脑梗死患者社区康复运动应用效果。方法选取2017-01-01-2018-12-31深圳市蛇口人民医院出院的脑梗死患者180例,按康复治疗方案不同分为观察组与对照组,每组90例。观察组以弹力带、Bobath球、平衡垫、瑜伽垫等器材,制定标准化运动方案,组织患者进行以运动功能为主、兼顾平衡与柔韧性的社区康复运动;对照组仅根据指导与随访自行锻炼。两组分别于康复前及康复3个月后,进行肌力耐力、关节活动度、肌张力、偏瘫运动功能、步行能力、平衡功能和日常生活活动能力(activity of daily living,ADL)评估,以评价两组患者干预效果。结果干预3个月后,观察组肌力得分为(4.51±0.60)分,高于对照组的(3.63±0.64)分,t=9.431,P<0.001;关节活动度得分为(3.60±0.49)分,高于对照组的(2.93±0.44)分,t=9.530,P<0.001;肌张力得分为(0.34±0.56)分,低于对照组的(1.37±0.79)分,t=-10.029,P<0.001;偏瘫运动功能得分为(5.27±0.76)分,高于对照组的(3.63±0.64)分,t=15.539,P<0.001;步行能力得分为(4.04±1.22)分,高于对照组的(2.21±1.13)分,t=10.444,P<0.001;平衡功能得分为(4.27±1.07)分,高于对照组的(3.02±1.57)分,t=6.211,P<0.001;ADL得分为(85.44±19.90)分,高于对照组的(57.28±25.32)分,t=8.298,P<0.001。结论社区康复运动可有效恢复脑梗死患者运动能力和生活能力。
