Tin mono-sulphide(Sn S) nanoparticles(Nps) have been successfully synthesised through ionic liquid assisted hydrothermal method using hydrated tin(II) chloride as a precursor, thiourea as sulphur source precurso...Tin mono-sulphide(Sn S) nanoparticles(Nps) have been successfully synthesised through ionic liquid assisted hydrothermal method using hydrated tin(II) chloride as a precursor, thiourea as sulphur source precursors using 2-Methoxy ethyl methyl imidazolium methane sulfonate ionic liquid as co-solvent. The Reitveld refinement on powder X-ray diffraction(PXRD) confirmed the presence of orthorhombic Sn S structure as major phase along with traces amount of Sn S2 and Sn2 S3. Diffuse reflectance spectrum studies revealed the energy band gap around 1.38 e V. TEM images confirmed the Sn S Nps with average particle size of 40 nm and HRTEM suggest good crystallinity. The electrochemical property for lithium storage behaviour shows an initial discharge capacity of 658 m Ah/g and it retains discharge capacity of 426 m Ah/g for 16 cycles, at current density 100 m A/g. The obtained results indicate that Sn S Nps to be one of the possible promising anode materials for next generation Lithium batteries. Photoluminescence study of Sn S Nps shows a strong green emission at 530 nm. Sn S Nps were also tested for the photocatalytic adsorption of methylene blue and Rhodamine B.展开更多
All solid-state electrolytes have the advantages of good mechanical and thermal properties for safer energy storage,but their energy density has been limited by low ionic conductivity and large interfacial resistance ...All solid-state electrolytes have the advantages of good mechanical and thermal properties for safer energy storage,but their energy density has been limited by low ionic conductivity and large interfacial resistance caused by the poor Li~+transport kinetics due to the solid-solid contacts between the electrodes and the solid-state electrolytes.Herein,a novel gel polymer electrolyte(UPP-5)composed of ionic liquid incorporated metal-organic frameworks nanoparticles(IL@MOFs)is designed,it exhibits satisfying electrochemical performances,consisting of an excellent electrochemical stability window(5.5 V)and an improved Li^(+)transference number of 0.52.Moreover,the Li/UPP-5/LiFePO_(4) full cells present an ultra-stable cycling performance at 0.2C for over 100 cycles almost without any decay in capacities.This study might provide new insight to create an effective Li^(+)conductive network for the development of all-solid-state lithium-ion batteries.展开更多
Organic small structure quinones go with ionic liquids electrolytes would exhibit ultrastable electrochemical properties.In this study,calix[6]quinone(C6Q) cathode was matched with ionic liquid electrolyte Li[TFSI]/[P...Organic small structure quinones go with ionic liquids electrolytes would exhibit ultrastable electrochemical properties.In this study,calix[6]quinone(C6Q) cathode was matched with ionic liquid electrolyte Li[TFSI]/[PY13][TFSI](bis(trifluoromethane)sulfonimide lithium salt/N-methyl-N-pro pylpyrrolidinium bis(trifluoromethanesulfonyl)amide) to assemble lithium-ion batteries(LIBs).The electrochemical performance of LIBs was systematically studied.The capacity retention rates of C6Q through 1000 cycles at current densities of 0.2 C and 0.5 C were 70% and 72%,respectively.At 5 C, the capacity was maintained at 190 mAh g^(-1) after 1000 cycles,and 155 mAh g^(-1) even after 10,000 cycles,comparable to inorganic materials.This work would give a big push to the practical process of organic electrode materials in energy storage.展开更多
In this paper we report the results of combined cycle- and life-aging and abuse tests carried out under severe conditions on Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>/LiFePO<sub...In this paper we report the results of combined cycle- and life-aging and abuse tests carried out under severe conditions on Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>/LiFePO<sub>4</sub> lithium-ion stacked prototypes using a PYR<sub>14</sub> FSI-LiTFSI ionic liquid electrolyte. No relevant degradation phenomena took place within ionic liquid electrolyte during prolonged inactivity period or overcharging. No fire/explosion or venting event as well as no gas development occurred during abuse tests, which led only to modest raise in temperature. Therefore, electrodes based on Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> and LiFePO<sub>4</sub> active materials can be favorably combined with non-volatile and non-flammable pyrrolidinium FSI ionic liquid electrolytes to realize highly safe lithium-ion battery systems.展开更多
Ionic liquids(ILs)have appeared as the most promising electrolytes for lithium-ion batteries,owing to their unique high ionic conductivity,chemical stability and thermal stability properties.Poly(ionic liquid)s(PILs)w...Ionic liquids(ILs)have appeared as the most promising electrolytes for lithium-ion batteries,owing to their unique high ionic conductivity,chemical stability and thermal stability properties.Poly(ionic liquid)s(PILs)with both IL-like characteristic and polymer structure are emerging as an alternative of traditional electrolyte.In this review,recent progresses on the applications of IL/PIL-based semi-solid state electrolytes,including gel electrolytes,ionic plastic crystal electrolytes,hybrid electrolytes and single-ion conducting electrolytes for lithium-ion batteries are discussed.展开更多
Cobalt oxide(Co_(3)O_(4))is currently suitable in energy storage applications because of its high capacity based on the conversion reaction mechanism.However,unmodified Co_(3)O_(4)suffers from distinctly inferior rate...Cobalt oxide(Co_(3)O_(4))is currently suitable in energy storage applications because of its high capacity based on the conversion reaction mechanism.However,unmodified Co_(3)O_(4)suffers from distinctly inferior rate capability and poor cycling stability.On the basis of the aforementioned considerations and density functional theory(DFT)simulations,the three-dimensional hierarchical porous structure(HPS)ultrasmall Co_(3)O_(4)anchored into ionic liquid(IL)modified graphene oxide(GO)has been successfully prepared(ultrasmall/Co_(3)O_(4)-GA-IL).The ultrasmall/Co_(3)O_(4)-GA-IL consists of Co_(3)O_(4)co-assembled with IL modified GO to generate the HPS which can facilitate ion transfer channels through reduction of the electron and ion transportation path and transmission impedance.In addition,N-doping graphene can enhance the inherent electrical conductivity of Co_(3)O_(4),which is proved by the DFT calculations.By virtue of the novel superstructure,the ultrasmall/Co_(3)O_(4)-GA-IL electrode demonstrates a high reversible capacity of 1,304 mAh·g^(−1),an enhanced high-rate capability(715 mAh·g^(−1)at 5 C),and a capacity retention of 98.4%even after 500 cycles at 5 C rate,which corresponds to 0.0003%capacity loss per cycle.Pouch cells based on the cathode are further fabricated and demonstrate excellent mechanical and electrochemical properties under bent and folded state,highlighting the practical application of our deliberately designed electrode in wearable electronics.展开更多
Orthorhombic-phase Nb_(2)O_(5)(T-Nb_(2)O_(5)) has been widely investigated as an intercalation anode material for Li-ion batteries due to the larger interplanar lattice spacing and high safety.However,its applications...Orthorhombic-phase Nb_(2)O_(5)(T-Nb_(2)O_(5)) has been widely investigated as an intercalation anode material for Li-ion batteries due to the larger interplanar lattice spacing and high safety.However,its applications are limited by the intrinsic low electric conductivity.Herein,an ultrathin N-doped carbon-coating layer was constructed on porous T-Nb_(2)O_(5) microspheres uniformly via a convenient thermal treatment method with ionic liquid as a carbon precursor.The synthesized T-Nb_(2)O_(5)@N-C exhibits significantly enhanced rate capability(155.5 mAh·g^(-1) at 20 C) than initial T-Nb_(2)O_(5)(110.2 mAh·g^(-1) at 20C).Besides,T-Nb_(2)O_(5)@N-C shows ultralong cycle life,with only a 0.02% decrease in the capacity per cycle at a high current density of 10 C.The corresponding electrochemical tests show that the preferable rate capability of T-Nb_(2)O_(5)@N-C electrode is attributed to the increased electronic conductivity and pseudocapacitance contribution induced by ultrathin surface N-doped carbon layer.On the other hand,the mesoporous structure of T-Nb_(2)O_(5)@N-C ensures fast Li+ diffusion dynamics and electrolyte penetration.Furthermore,T-Nb_(2)O_(5)@N-C also performs well in a LiNi_(0.5)Mn_(0.3)Co_(0.2)O_(4) llT-Nb_(2)O_(5)@N-C full cell.This work provides a facile method to construct integrated anode materials for potential applications in lithium-ion batteries.展开更多
采用以离子液体乙醇胺乳酸盐为反应介质的离子热法在常压低温下成功制备出LiMnPO4,经添加蔗糖后在不同温度下高温处理获得了LiMnPO4/C正极材料。通过X射线衍射、扫描电子显微镜和透射电子显微镜表征了材料的相态和形貌,采用充放电法研...采用以离子液体乙醇胺乳酸盐为反应介质的离子热法在常压低温下成功制备出LiMnPO4,经添加蔗糖后在不同温度下高温处理获得了LiMnPO4/C正极材料。通过X射线衍射、扫描电子显微镜和透射电子显微镜表征了材料的相态和形貌,采用充放电法研究了材料的电化学性能。结果表明:磷酸锰锂的晶相为橄榄石型;材料颗粒的尺寸主要分布在150~300 nm;较高温度下获得的LiMnPO4/C材料表现出较好的电化学性能,在0.05 C下放电容量达114.0 mA h/g,10次循环后比容量仍保持在102.3 mA h/g。这种以乙醇胺乳酸盐为反应介质的离子热法为锂离子电池正极材料LiMnPO4的制备提供了新的途径。展开更多
基金BRNS-BARC,Department of Atomic Energy,Govt.of India(37(2)/14/25/2015/BRNS dated 03/12/2015)for financial help to carry out the research workISRO-RESPOND(Project no.ISRO/RES/3/661/2014-15 Dated 14-07-2014)Govt.of India for financial supportVision Group of Science and Technology,Govt.of Karnataka,for the financial help under the scheme of Seed Money to Young Scientists for research activities.(SMYSR,GRD Number–498)
文摘Tin mono-sulphide(Sn S) nanoparticles(Nps) have been successfully synthesised through ionic liquid assisted hydrothermal method using hydrated tin(II) chloride as a precursor, thiourea as sulphur source precursors using 2-Methoxy ethyl methyl imidazolium methane sulfonate ionic liquid as co-solvent. The Reitveld refinement on powder X-ray diffraction(PXRD) confirmed the presence of orthorhombic Sn S structure as major phase along with traces amount of Sn S2 and Sn2 S3. Diffuse reflectance spectrum studies revealed the energy band gap around 1.38 e V. TEM images confirmed the Sn S Nps with average particle size of 40 nm and HRTEM suggest good crystallinity. The electrochemical property for lithium storage behaviour shows an initial discharge capacity of 658 m Ah/g and it retains discharge capacity of 426 m Ah/g for 16 cycles, at current density 100 m A/g. The obtained results indicate that Sn S Nps to be one of the possible promising anode materials for next generation Lithium batteries. Photoluminescence study of Sn S Nps shows a strong green emission at 530 nm. Sn S Nps were also tested for the photocatalytic adsorption of methylene blue and Rhodamine B.
基金financially supported by National Natural Science Foundation of China (No.21701083)。
文摘All solid-state electrolytes have the advantages of good mechanical and thermal properties for safer energy storage,but their energy density has been limited by low ionic conductivity and large interfacial resistance caused by the poor Li~+transport kinetics due to the solid-solid contacts between the electrodes and the solid-state electrolytes.Herein,a novel gel polymer electrolyte(UPP-5)composed of ionic liquid incorporated metal-organic frameworks nanoparticles(IL@MOFs)is designed,it exhibits satisfying electrochemical performances,consisting of an excellent electrochemical stability window(5.5 V)and an improved Li^(+)transference number of 0.52.Moreover,the Li/UPP-5/LiFePO_(4) full cells present an ultra-stable cycling performance at 0.2C for over 100 cycles almost without any decay in capacities.This study might provide new insight to create an effective Li^(+)conductive network for the development of all-solid-state lithium-ion batteries.
基金supported by the National Natural Science Foundation of China (Nos. 21875206 and 21403187)the Natural Science Foundation of Hebei Province (B2019203487)。
文摘Organic small structure quinones go with ionic liquids electrolytes would exhibit ultrastable electrochemical properties.In this study,calix[6]quinone(C6Q) cathode was matched with ionic liquid electrolyte Li[TFSI]/[PY13][TFSI](bis(trifluoromethane)sulfonimide lithium salt/N-methyl-N-pro pylpyrrolidinium bis(trifluoromethanesulfonyl)amide) to assemble lithium-ion batteries(LIBs).The electrochemical performance of LIBs was systematically studied.The capacity retention rates of C6Q through 1000 cycles at current densities of 0.2 C and 0.5 C were 70% and 72%,respectively.At 5 C, the capacity was maintained at 190 mAh g^(-1) after 1000 cycles,and 155 mAh g^(-1) even after 10,000 cycles,comparable to inorganic materials.This work would give a big push to the practical process of organic electrode materials in energy storage.
文摘In this paper we report the results of combined cycle- and life-aging and abuse tests carried out under severe conditions on Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub>/LiFePO<sub>4</sub> lithium-ion stacked prototypes using a PYR<sub>14</sub> FSI-LiTFSI ionic liquid electrolyte. No relevant degradation phenomena took place within ionic liquid electrolyte during prolonged inactivity period or overcharging. No fire/explosion or venting event as well as no gas development occurred during abuse tests, which led only to modest raise in temperature. Therefore, electrodes based on Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> and LiFePO<sub>4</sub> active materials can be favorably combined with non-volatile and non-flammable pyrrolidinium FSI ionic liquid electrolytes to realize highly safe lithium-ion battery systems.
基金supported by the National Science Fund for Distinguished Young Scholars(No.21425417)the National Natural Science Foundation of China(Nos.21835005 and U1862109)the Priority Academic Program Development of Jiangsu Higher Education Institutions.
文摘Ionic liquids(ILs)have appeared as the most promising electrolytes for lithium-ion batteries,owing to their unique high ionic conductivity,chemical stability and thermal stability properties.Poly(ionic liquid)s(PILs)with both IL-like characteristic and polymer structure are emerging as an alternative of traditional electrolyte.In this review,recent progresses on the applications of IL/PIL-based semi-solid state electrolytes,including gel electrolytes,ionic plastic crystal electrolytes,hybrid electrolytes and single-ion conducting electrolytes for lithium-ion batteries are discussed.
基金National Key Research and Development Program of China(No.2019YFA0705700)the National Natural Science Foundation of China(Nos.51774017 and 51904016)Key Program of Equipment Pre-Research Foundation of China(No.6140721020103)。
文摘Cobalt oxide(Co_(3)O_(4))is currently suitable in energy storage applications because of its high capacity based on the conversion reaction mechanism.However,unmodified Co_(3)O_(4)suffers from distinctly inferior rate capability and poor cycling stability.On the basis of the aforementioned considerations and density functional theory(DFT)simulations,the three-dimensional hierarchical porous structure(HPS)ultrasmall Co_(3)O_(4)anchored into ionic liquid(IL)modified graphene oxide(GO)has been successfully prepared(ultrasmall/Co_(3)O_(4)-GA-IL).The ultrasmall/Co_(3)O_(4)-GA-IL consists of Co_(3)O_(4)co-assembled with IL modified GO to generate the HPS which can facilitate ion transfer channels through reduction of the electron and ion transportation path and transmission impedance.In addition,N-doping graphene can enhance the inherent electrical conductivity of Co_(3)O_(4),which is proved by the DFT calculations.By virtue of the novel superstructure,the ultrasmall/Co_(3)O_(4)-GA-IL electrode demonstrates a high reversible capacity of 1,304 mAh·g^(−1),an enhanced high-rate capability(715 mAh·g^(−1)at 5 C),and a capacity retention of 98.4%even after 500 cycles at 5 C rate,which corresponds to 0.0003%capacity loss per cycle.Pouch cells based on the cathode are further fabricated and demonstrate excellent mechanical and electrochemical properties under bent and folded state,highlighting the practical application of our deliberately designed electrode in wearable electronics.
基金financially supported by the National Natural Science Foundation of China(No.21501101)the Natural Science Foundation of Henan Province(No.182300410226)+1 种基金the Technological Project of Henan Province(Nos.172102210426,172102210423 and 182102310068)the Education Department Project of Henan Province(No.16A150038)。
文摘Orthorhombic-phase Nb_(2)O_(5)(T-Nb_(2)O_(5)) has been widely investigated as an intercalation anode material for Li-ion batteries due to the larger interplanar lattice spacing and high safety.However,its applications are limited by the intrinsic low electric conductivity.Herein,an ultrathin N-doped carbon-coating layer was constructed on porous T-Nb_(2)O_(5) microspheres uniformly via a convenient thermal treatment method with ionic liquid as a carbon precursor.The synthesized T-Nb_(2)O_(5)@N-C exhibits significantly enhanced rate capability(155.5 mAh·g^(-1) at 20 C) than initial T-Nb_(2)O_(5)(110.2 mAh·g^(-1) at 20C).Besides,T-Nb_(2)O_(5)@N-C shows ultralong cycle life,with only a 0.02% decrease in the capacity per cycle at a high current density of 10 C.The corresponding electrochemical tests show that the preferable rate capability of T-Nb_(2)O_(5)@N-C electrode is attributed to the increased electronic conductivity and pseudocapacitance contribution induced by ultrathin surface N-doped carbon layer.On the other hand,the mesoporous structure of T-Nb_(2)O_(5)@N-C ensures fast Li+ diffusion dynamics and electrolyte penetration.Furthermore,T-Nb_(2)O_(5)@N-C also performs well in a LiNi_(0.5)Mn_(0.3)Co_(0.2)O_(4) llT-Nb_(2)O_(5)@N-C full cell.This work provides a facile method to construct integrated anode materials for potential applications in lithium-ion batteries.
文摘采用以离子液体乙醇胺乳酸盐为反应介质的离子热法在常压低温下成功制备出LiMnPO4,经添加蔗糖后在不同温度下高温处理获得了LiMnPO4/C正极材料。通过X射线衍射、扫描电子显微镜和透射电子显微镜表征了材料的相态和形貌,采用充放电法研究了材料的电化学性能。结果表明:磷酸锰锂的晶相为橄榄石型;材料颗粒的尺寸主要分布在150~300 nm;较高温度下获得的LiMnPO4/C材料表现出较好的电化学性能,在0.05 C下放电容量达114.0 mA h/g,10次循环后比容量仍保持在102.3 mA h/g。这种以乙醇胺乳酸盐为反应介质的离子热法为锂离子电池正极材料LiMnPO4的制备提供了新的途径。