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文献 报告

文献 报告. 题目 : 静电纺丝在钠离子电池中的应用. 报告学生 :金 娟 指导教师 :王成扬. 2013-07-09. 比较硬碳材料在钠电和锂电中的电性能差异, 寻找适合于钠离子储存的硬碳结构; 通过 C 与 Sn 的共纺,改善 Sn 电极在钠电负极体积变化 及粉化现象,得到高比容量的负极。. 难点. 1 、静电纺多孔碳纳米纤维 --- 钠离子嵌入纳米空洞中 , 提高容量 2 、碳前驱体与合金颗粒 共纺( C 与 Sn ).

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文献 报告

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  1. 文献报告 题目:静电纺丝在钠离子电池中的应用 报告学生 :金 娟 指导教师 :王成扬 2013-07-09

  2. 比较硬碳材料在钠电和锂电中的电性能差异, 寻找适合于钠离子储存的硬碳结构; 通过C与Sn的共纺,改善Sn电极在钠电负极体积变化 及粉化现象,得到高比容量的负极。 难点 1、静电纺多孔碳纳米纤维 ---钠离子嵌入纳米空洞中,提高容量 2、碳前驱体与合金颗粒共纺(C与Sn) 1、使用哪种硬碳?层间距要大,多孔道 2、使用哪种锡盐,如何得到易纺且不会发生Sn颗粒团聚,性能好的电极材料 思路 意义 ??

  3. hard carbon materials large interlayer distance and disordered Structure facilitates Na-ion insertion −extraction. 200− 300 mAh/g large irreversible capacity ( ∼ 70%) Nanostructured materials structural stability and good conducting connectivity. Cao, Y., et al. (2012). "Sodium ion insertion in hollow carbon nanowires for battery applications." Nano Lett 12(7): 3783-3787.

  4. Figure 1. SEM images of the PANI-HNWs (a, b) and HCNWs (c, d). TEM images of the PANI-HNWs (e) and HCNWs (f). (g) High- resolution TEM images of the HCNWs.

  5. graphite electrode ( NaC70) petroleum coke (NaC30) Shawinigan black (NaC15). pitch-based materials (Na0.31C8) PAN-based fibres Na0.75C8------209mAh/g (The reference compound is Na1C8and corresponds to a capacity of 279mAh/g

  6. 注意 (3)Na-ion和Li-ion扣式电池组装、测试 (1)PAN溶液的配置-----静电纺丝 • PAN浓度的选择、预氧化碳化温度程序的设定 • 锂电钠电参数要相同 碳纤维 (2)预氧化----碳化 实验方案 两步----碳纤维

  7. 12%PAN的DMF溶液,常温搅拌24h,电纺(-5KV----20KV,1ml/h,16cm)12%PAN的DMF溶液,常温搅拌24h,电纺(-5KV----20KV,1ml/h,16cm)

  8. 原因: 1、接收距离短,溶剂为完全挥发,出现了串珠结构? 2、纺丝过程中针头有液滴滴下来,污染了纺布? 3、仪器内的灰尘杂志还是储存过程中沾上了不明物?

  9. 预氧化中与化中怎么目的 创新与难点 预氧化中怎么施加拉力。怎么保持纤维形貌? 碳化时用陶瓷板固定? 装电池时,要研磨粉碎后80:10:10配成溶液刮刀,还是直接压到泡沫镍上?

  10. Yujie Zhu, et al. (2013). "ElectrospunSb/C Fibers for a Stable and Fast Sodium-Ion Battery Anode." nano.

  11. 实验方案 静电纺C/Sn复合纤维

  12. Sn(992mAh/g)与SnO2(780mAh/g) ? Sn颗粒的团聚问题? Sno2的不可逆容量?500度以上C还原。 预氧化中与化中怎么目的 创新与难点 实验小结

  13. 1 文献综述 2 课题总结 3 实验方案 4 实验进度 Dec, 2013 Sep, 2013 July, 2013 Oct,2013 August,2013 Just do it • 实验总结 • 撰写报告 • 准备答辩 • PAN碳纤维 • 钠电容量 • 做好开题 • 明确方向 • 选择具体实验方案(C/Sn) 2000

  14. Thank You! Any more information please give some questions

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