The ever-growing demand for wearable electronics drives the development of stretchable lithium-ion batteries(LIBs)with fast charging capability,in which stretchable polymer electrolytes(PEs)with high ionic conductivit...The ever-growing demand for wearable electronics drives the development of stretchable lithium-ion batteries(LIBs)with fast charging capability,in which stretchable polymer electrolytes(PEs)with high ionic conductivity and lithium-ion transference numbers(urn:x-wiley:1001604X:media:cjoc202200287:cjoc202200287-math-0001)are highly desirable.Herein,we report a highly stretchable and elastic PE with high ionic conductivity and urn:x-wiley:1001604X:media:cjoc202200287:cjoc202200287-math-0001,which is applicable in high-rate and stretchable LIBs.The PE was fabricated by incorporating polyethylene glycol(PEG)and lithium salts into polyurethane networks,whereinα-cyclodextrin(α-CD)acts as the cross-linker.The PEG chains are cross-linked by covalent and noncovalent bonds,and some PEG chains enter into the cavity ofα-CD to form PEG/α-CD inclusions.These structural features effectively suppress crystallization of the PEG chains,hinder movement of the counterions of Li+,and endow PE with satisfactory mechanical robustness.展开更多
The rechargeable Li-CO2 battery has attracted much attention for energy storage because of the high energy density and efficient utilization of greenhouse gas. However, it＇s still suffered by low safety issue of liqu...The rechargeable Li-CO2 battery has attracted much attention for energy storage because of the high energy density and efficient utilization of greenhouse gas. However, it＇s still suffered by low safety issue of liquid electrolyte. Herein, a composite cathode consisting of CNTs and polymer electrolytes was fabricated by the insitu polymerization process for the polymer electrolyte-based solid-state Li-CO2 batteries. With the good dispersion of CNTs and polymer electrolyte, the composite cathode is covered by film-like discharge products Li2CO3.Furthermore, the Li-CO2 battery shows high reversible capacity （- 11,000 mAh·g^-1）, excellent cycle stability （1000 mAb·g^-1 for 100 cycles） under low charge potential （〈 4.5 V）, and outstanding rate performances at room temperature, which are much better than those of liquid electrolyte-based battery. Therefore, the polymer electrolyte-based Li-CO2 battery prepared by this strategy can be a promising candidate to meet the demands of high safety and high-performance energy storage devices.展开更多
基金X.L.thanks the National Key R&D Program of China(2018YFC1105401)for the financial support.
文摘The ever-growing demand for wearable electronics drives the development of stretchable lithium-ion batteries(LIBs)with fast charging capability,in which stretchable polymer electrolytes(PEs)with high ionic conductivity and lithium-ion transference numbers(urn:x-wiley:1001604X:media:cjoc202200287:cjoc202200287-math-0001)are highly desirable.Herein,we report a highly stretchable and elastic PE with high ionic conductivity and urn:x-wiley:1001604X:media:cjoc202200287:cjoc202200287-math-0001,which is applicable in high-rate and stretchable LIBs.The PE was fabricated by incorporating polyethylene glycol(PEG)and lithium salts into polyurethane networks,whereinα-cyclodextrin(α-CD)acts as the cross-linker.The PEG chains are cross-linked by covalent and noncovalent bonds,and some PEG chains enter into the cavity ofα-CD to form PEG/α-CD inclusions.These structural features effectively suppress crystallization of the PEG chains,hinder movement of the counterions of Li+,and endow PE with satisfactory mechanical robustness.
基金financially supported by the National Natural Science Foundation of China(Nos.51622202,U1507107,21503009 and 21603009)Beijing Natural Science Foundation(B)(No.KZ201610005003)+1 种基金Guangdong Science and Technology Project(No.2016B010114001)the Funding Projects for ‘‘Thousand Youth Talents Plan’’
文摘The rechargeable Li-CO2 battery has attracted much attention for energy storage because of the high energy density and efficient utilization of greenhouse gas. However, it＇s still suffered by low safety issue of liquid electrolyte. Herein, a composite cathode consisting of CNTs and polymer electrolytes was fabricated by the insitu polymerization process for the polymer electrolyte-based solid-state Li-CO2 batteries. With the good dispersion of CNTs and polymer electrolyte, the composite cathode is covered by film-like discharge products Li2CO3.Furthermore, the Li-CO2 battery shows high reversible capacity （- 11,000 mAh·g^-1）, excellent cycle stability （1000 mAb·g^-1 for 100 cycles） under low charge potential （〈 4.5 V）, and outstanding rate performances at room temperature, which are much better than those of liquid electrolyte-based battery. Therefore, the polymer electrolyte-based Li-CO2 battery prepared by this strategy can be a promising candidate to meet the demands of high safety and high-performance energy storage devices.
