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| 1 | Sodium-Ion Battery Anode Construction with SnP_(x)Crystal Domain in Amorphous Phosphorus Matrix显示文摘The high-capacity phosphorus-(P-)based anode materials for sodium-ion batteries(NIBs)often face poor performance retentions owing to the low conductivity and large volume expansion.It is thus essential to buffer these problems by appropriately alloying with other elements such as tin(Sn)and constructing well-designed microstructures.Herein,a series of P-/Sn-based composites have been synthesized by the facile and low-cost one-step ball milling.Pair distribution function(PDF)has been employed as a hardcore quantitative technique to elucidate their structures combined with other techniques,suggesting the formation and ratios of Sn4P3 and Sn crystalline domains embedded inside an amorphous P/carbon matrix.The composite with the largest amount of Sn4P3 in the P/C matrix can deliver the most balanced electrochemical performance,with a capacity of 422.3 mA-h g^(−1 )for 300 cycles at a current density of 1000mAg^(−1).The reaction mechanism has been elucidated by 23Na and 31P solid-state nuclear magnetic resonance(NMR)investigations.The study sheds light on the rational design and concrete identification of P-/Sn-based amorphous-dominant composite materials for NIBs. | Baixu Chen Yubo Yang Aibing Chen Xu Zhang Jaffer Saddique Mingxue Tang Haijun Yu | 2021 | Energy Material Advances2021，，1： | 1 |
| 2 | Sn基合金作为钠离子电池负极材料的研究进展显示文摘由于钠具有较低的成本和较大的储量,钠离子电池已成为新型储能系统的研究热点。但由于钠离子的半径远大于锂离子,因此原有的商业化石墨类碳负极材料无法使用。Sn基合金作为钠离子电池负极材料的研究热点,近年来呈现了一些独特的研究手段,系统总结了Sn-P、Sn-S、Sn-M(M为过渡金属元素)以及Sn-M-N三元合金负极材料近年的研究进展。 | 黄钊文 李友朋 刘竞博 黄楚婷 张倚琪 | 2023 | 电源技术2023，47，5： | 0 |
| 3 | Theoretical research into low-voltage Na_(2)TiSiO_(5)anode for lithium-ion battery显示文摘Na_(2)TiSiO_(5)(NTSO)is a low-cost Li-ion battery anode with great application potential,such as the tetragonal NTSO(T-NTSO)with a high capacity and a low voltage.In addition to the tetragonal structure,NTSO has two other polymorphs.However,the basic understanding of the structure,ion insertion and transport mechanisms of these new materials is still lacking.Herein,we present a combined experimental and computational investigation of the tetragonal and orthorhombic NTSO to reveal the intrinsic mechanism leading to the superior electrochemical performance of T-NTSO.We determined that the insertion site with a flexible Ti^(4+)/Ti^(3+)redox pair is critical for Li+insertion stability.The large number of such flexible sites in the T-NTSO results in a higher capacity and higher ionic conductivity than those of orthorhombic polymorph.The understanding of intrinsic properties will accelerate the development and utilization of titanosilicates as the next generation low-voltage anode of Li-ion battery. | Shu Zhao Tian-Hao Wu Di He Zi-He Zhang Bo-Ya Wang Li-Hang Wang Hai-Jun Yu | 2022 | Rare Metals2022，41，10： | 0 |
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