Sodium-ion batteries(SIBs)have been extensively studied as the potential alter-native to lithium-ion batteries(LIBs)due to the abundant natural reserves and low price of sodium resources.Nevertheless,Na+ions possess a...Sodium-ion batteries(SIBs)have been extensively studied as the potential alter-native to lithium-ion batteries(LIBs)due to the abundant natural reserves and low price of sodium resources.Nevertheless,Na+ions possess a larger radius than Li+,resulting in slow diffusion dynamics in electrode materials,and thus seeking appropriate anode materials to meet high performance standards has become a trend in the field of SIBs.In this context,owing to the advantages of high theoretical capacity and proper redox potential,metal phosphides(MPs)are considered to be the promising materials to make up for the gap of SIBs anode materials.In this review,the recent development of MPs anode materials for SIBs is reviewed and analyzed comprehensively and deeply,including the synthesis method,advanced modification strategy,electrochemical performance,and Na storage mechanism.In addition,to promote the wide application of the emerg-ing MPs anodes for SIBs,several research emphases in the future are pointed out to overcome challenges toward the commercial application.展开更多
Lithium ion batteries(LIBs)that can be operated under extended temperature range hold significant application potentials.Here in this work,we successfully synthesized Co2V2O7 electrode with rich porosity from a facile...Lithium ion batteries(LIBs)that can be operated under extended temperature range hold significant application potentials.Here in this work,we successfully synthesized Co2V2O7 electrode with rich porosity from a facile hydrothermal and combustion process.When applied as anode for LIBs,the electrode displayed excellent stability and rate performance in a wide range of temperatures.Remarkably,a stable capacity of 206 mAhg 1 was retained after cycling at a high current density of 10 A·g-1 for 6,000 cycles at room temperature(25℃).And even when tested under extreme conditions,i.e.,-20 and 60℃,the battery still maintained its remarkable stability and rate capability.For example,at-20℃,a capacity of 633 mAh·g 1 was retained after 50 cycles at 0.1 A·g 1;and even after cycling at 60℃ at 10 A·g-1 for 1,000 cycles,a reversible capacity of 885 mAh·g-1 can be achieved.We believe the development of such electrode material will fciliate progress of the next-generation LIBs with wide operating windows.展开更多
基金National Natural Science Founda-tion of China,Grant/Award Numbers:51925207,U1910210,51872277,51972067,51802044,51902062,51802043Funda-mental Research Funds for the Central Universities,Grant/Award Number:WK2060140026+2 种基金the DNL cooperation Fund,CAS,Grant/Award Number:DNL180310National Synchrotron Radi-ation Laboratory,Grant/Award Num-ber:KY2060000173Guangdong Nat-ural Science Funds for Distinguished Young Scholar,Grant/Award Number:2019B151502039。
文摘Sodium-ion batteries(SIBs)have been extensively studied as the potential alter-native to lithium-ion batteries(LIBs)due to the abundant natural reserves and low price of sodium resources.Nevertheless,Na+ions possess a larger radius than Li+,resulting in slow diffusion dynamics in electrode materials,and thus seeking appropriate anode materials to meet high performance standards has become a trend in the field of SIBs.In this context,owing to the advantages of high theoretical capacity and proper redox potential,metal phosphides(MPs)are considered to be the promising materials to make up for the gap of SIBs anode materials.In this review,the recent development of MPs anode materials for SIBs is reviewed and analyzed comprehensively and deeply,including the synthesis method,advanced modification strategy,electrochemical performance,and Na storage mechanism.In addition,to promote the wide application of the emerg-ing MPs anodes for SIBs,several research emphases in the future are pointed out to overcome challenges toward the commercial application.
基金the National Natural Science Foundation of China(Nos.21606003,51802044,51972067,51672193,51420105002,and 51920105004)State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization.The authors also acknowledge Singapore MOE AcRF Tier 2 under Grant Nos.2018-T2-1-010 and MOE2017-T2-2-069National Research Foundation of Singapore(NRF)Investigatorship,award Number NRF2016NRFNRFI001-22.
文摘Lithium ion batteries(LIBs)that can be operated under extended temperature range hold significant application potentials.Here in this work,we successfully synthesized Co2V2O7 electrode with rich porosity from a facile hydrothermal and combustion process.When applied as anode for LIBs,the electrode displayed excellent stability and rate performance in a wide range of temperatures.Remarkably,a stable capacity of 206 mAhg 1 was retained after cycling at a high current density of 10 A·g-1 for 6,000 cycles at room temperature(25℃).And even when tested under extreme conditions,i.e.,-20 and 60℃,the battery still maintained its remarkable stability and rate capability.For example,at-20℃,a capacity of 633 mAh·g 1 was retained after 50 cycles at 0.1 A·g 1;and even after cycling at 60℃ at 10 A·g-1 for 1,000 cycles,a reversible capacity of 885 mAh·g-1 can be achieved.We believe the development of such electrode material will fciliate progress of the next-generation LIBs with wide operating windows.
