Melt-spun Al70−X Si30Mn X (X=0, 3, 5, 7, 10) anode in lithium-ion batteries

Sun, Zhanbo; Li, Xuepeng; Wang, Xiaodong; Hu, Qing; Zhao, Mingshu; Zhu, Yanan; Li, Yan; Song, Xiaoping

doi:10.1007/s11431-008-0188-4

Cited by 6 publications

(6 citation statements)

References 27 publications

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“…α-Si was not alloyed by Li during the discharge/charge processes (Figs. 5 and 6), which is consistent with the Al-Si-Mn [15][16][17] and Al-Si-Cu systems [18]. Both metallic glass and the Al-based supersaturated solid solution consisted of three components, so the thermodynamic condition of the co-existence of α-Al and AlLi during lithiation was met.…”

Section: Discussionsupporting

confidence: 74%

“…The DSC curves of the Al-Si-Ni system (Fig. 3) indicate that their separating temperatures were lower than those of Al-Si-Mn [16]. It means that the diffusion activation energy of atoms in the present nonequilibrium Al-Si-Ni alloys is lower than that in Al-Si-Mn [16], resulting in the easier formation of AlLi in the present alloys during lithiation.…”

Section: Discussionmentioning

confidence: 85%

“…Subsequently, it displayed a stable cycle performance and maintained 661 mA h g −1 after 40 cycles. Such a result indicated that the electrochemical properties of the asquenched Al-Si-Ni alloys with an optimum composition were improved compared with the melt-spun Al-Si-Mn anodes [15][16][17] and Al 75−X Si 25 Cu X [18]. The initial discharge capacity of the Al 65 Si 25 Ni 10 anode was only 361 mA h g −1 .…”

Section: Resultsmentioning

confidence: 99%

“…In our prior investigations [15][16][17][18], the melt-spun Al-Si-Mn and Al-Si-Cu ribbons were prepared as lithium-ion battery anode materials. In the investigations, nanocrystalline Al 67 Si 30 Mn 3 showed a low capacity of 326 mA h g −1 but a very stable cycle performance during 40 cycles, and the AlLi intermetallic compound did not appear in the lithiated Al-Si-Mn anodes [16]. Although the Al 71 Si 25 Cu 4 anode exhibited a discharge specific capacity of 1,324 mA h g −1 initially, its capacity was only 508 mA h g −1 after 20 cycles, and a great deal of AlLi intermetallic compound was detected in the lithiated alloys [18].…”

Section: Introductionmentioning

confidence: 99%

“…The lithiated mechanisms of melt-spun Al-Si-Mn and Al-Si-Cu were different [15][16][17][18]. Thus, it can be predicted that the third component has a key influence on the mechanism of the Al-Si-based anode materials.…”

Section: Introductionmentioning

confidence: 99%

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The electrochemical properties of Al–Si–Ni alloys composed of nanocrystal and metallic glass for lithium-ion battery anodes

Zhang

Song

Wang

et al. 2012

J Solid State Electrochem

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Melt-spun Al 75−X Si 25 Ni X (X02, 4, 7, and 10 mol%) alloys were investigated as anode materials for lithium-ion batteries. The Al 68 Si 25 Ni 7 anode showed a maximum capacity of 840 mA h g −1 at the fifth cycle and maintained 661 mA h g −1 after 40 cycles with a high coulumbic efficiency of 93%. The specific capacity increased as the decrease in the Ni content during the first 20 cycles, but the cycle performance became poorer. For the Al 65 Si 25 Ni 10 anode, the specific capacity increased slowly as the cycles increased and reached 370 mA h g −1 after 40 cycles. When the Al 68 Si 25 Ni 7 ribbons were annealed, their initial capacity became higher, but much poorer cycle performance and low coulumbic efficiency occurred. Except Al 65 Si 25 Ni 10, the AlLi compound could be detected in the anodes after lithiation. However, the capacity faded rapidly due to the formation of excessive AlLi in the Al 73 Si 25 Ni 2 and annealed Al 68 Si 25 Ni 7 anodes. The experiments revealed that the as-quenched ribbons consisted of the nanoscaled α-Al, metallic glass and α-Si, and their fractions were dependent on the Ni content. The α-Al was a supersaturated solid solution of Si and Ni in fcc-Al. For the as-quenched Al 68 Si 25 Ni 7 ribbons, the α-Al grains were embedded in the amorphous matrix. It can be understood that metallic glass can store Li, and the supersaturated solid solution can store Li even more easily compared with other known Al-Si-based alloys. A conclusion can be drawn that the microstructure that the nanoscaled α-Al embedded in the metallic glass matrix is beneficial to improve the structure stability, restrain serious structural evolution, and limit the volume variation and pulverization during electrochemical cycles.

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