The research of borate materials as sodium-ion batteries(SIBs) anode is still in the early stages,but the boron polyoxoanions are attracting intense interest due to their low atomic weight and high electronegative fea...The research of borate materials as sodium-ion batteries(SIBs) anode is still in the early stages,but the boron polyoxoanions are attracting intense interest due to their low atomic weight and high electronegative features.In this work,FeBO_(3) was prepared with low-cost raw materials and evaluated as SIBs anode.The FeBO_(3) shows a high reversible capacity of 328 mAh/g at the current density of 0.4 A/g.In addition,the electrochemical performance of FeBO_(3) can be improved by carbon coating.The prepared carbon-coated FeBO_(3) composite has a reversible capacity of 426 mAh/g(at 0.4 A/g) and an outstanding rate capability of 272 mAh/g(at 1.6 A/g).Furthermore,the sodium storage mechanism of FeBO_(3) was studied by in-situ XRD and ex-situ XPS.展开更多
基金supported by the National Natural Science Foundation of China (Nos.21673136 and 22075173)the Science and Technology Commission of Shanghai Municipality (No.19DZ2271100)。
文摘The research of borate materials as sodium-ion batteries(SIBs) anode is still in the early stages,but the boron polyoxoanions are attracting intense interest due to their low atomic weight and high electronegative features.In this work,FeBO_(3) was prepared with low-cost raw materials and evaluated as SIBs anode.The FeBO_(3) shows a high reversible capacity of 328 mAh/g at the current density of 0.4 A/g.In addition,the electrochemical performance of FeBO_(3) can be improved by carbon coating.The prepared carbon-coated FeBO_(3) composite has a reversible capacity of 426 mAh/g(at 0.4 A/g) and an outstanding rate capability of 272 mAh/g(at 1.6 A/g).Furthermore,the sodium storage mechanism of FeBO_(3) was studied by in-situ XRD and ex-situ XPS.
