Lithium intercalation into disordered carbon/SiCN composite. Part 2: Raman spectroscopy and 7Li MAS NMR investigation of lithium storage sites
Lithium intercalation into disordered carbon/SiCN composite. Part 2: Raman spectroscopy and 7Li MAS NMR investigation of lithium storage sites
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锂嵌入无序碳/SiCN 复合材料第 2 部分：锂储存位点的拉曼光谱和 7Li MAS NMR 研究
DOI：
10.1007/s10008-016-3337-x
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发表时间：
2017
影响因子：
2.5
通讯作者：
R. Riedel
中科院分区：
文献类型：
--
作者：
M. Graczyk-Zajac;M. Wimmer;G. Buntkowsky;C.Neumann;R. Riedel
在这项工作中，我们分析了碳/硅碳氮化物（SiCN）复合材料内的锂存储网站。将不同孔隙率的商用碳HD 3（硬碳）和LD 1 N和LD 2N（软碳）用聚硅氮烷（HTT 1800）浸渍并在1100 °C下热解。在本研究的第一部分中发现（Graczyk-Zajac等人，J Solid State Electrochem 19：2763-2769，2015），碳相的初始孔隙率在确定复合材料的锂插入容量和倍率性能中起重要作用。通过应用拉曼光谱和固态7 Li MAS NMR的原始，锂化，脱锂样品，我们调查的锂存储网站内的复合材料。通过拉曼光谱，已经发现，锂在硬碳衍生的复合材料中的储存在很大程度上通过在无组织碳内的吸附样过程发生，而对于软碳复合材料，7 Li固态NMR证实了这些发现，揭示了超过33%的锂存储在HD 3/SiCN以离子形式吸附在复合材料的表面和孔隙中，而约38%储存在碳层之间。LD 1 N和LD 2N复合材料在插层型位点储存超过50%的锂。
Within this work, we analyze the lithium storage sites within carbon/silicon carbonitride (SiCN) composites. Commercial carbons, HD3 (hard carbon) and LD1N and LD2N (soft carbons), of varying porosity are impregnated with polysilazane (HTT 1800) and pyrolysed at 1100 °C. It is found in the first part of this study (Graczyk-Zajac et al. J Solid State Electrochem 19:2763–2769, 2015) that the initial porosity of the carbon phase plays an important role in determining the lithium insertion capacity and rate capability of the composite material. By applying Raman spectroscopy and solid-state7Li MAS NMR on pristine, lithiated, and delithiated samples, we investigate the lithium storage sites within the composite materials. By means of Raman spectroscopy, it has been found that lithium storage in hard carbon-derived composites occurs in a significant extent via adsorption-like process within unorganized carbon, whereas for the soft carbon composites, storage in turbostratic carbon is identified.7Li solid-state NMR confirms these findings revealing that more than 33 % of lithium stored in HD3/SiCN is adsorbed in ionic form at the surface and in pores of the composite, while around 38 % is stored between carbon layers. LD1N and LD2N composites store more than 50 % of lithium in the intercalation-type sites.
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影响因子：
9.2
作者：
Kazuma Gotoh;Mariko Maeda;A. Nagai;A. Goto;M. Tansho;K. Hashi;T. Shimizu;H. Ishida
通讯作者：
Kazuma Gotoh;Mariko Maeda;A. Nagai;A. Goto;M. Tansho;K. Hashi;T. Shimizu;H. Ishida
影响因子：
3.2
作者：
M. Haaks;J. Kašpar;Anjuli Franz;M. Graczyk‐Zajac;R. Riedel;M. Vogel
通讯作者：
M. Haaks;J. Kašpar;Anjuli Franz;M. Graczyk‐Zajac;R. Riedel;M. Vogel
无序焦碳中的锂掺杂/去掺杂
DOI：
--
发表时间：
1995
期刊：
影响因子：
--
作者：
Y. Mori;T. Iriyama;T. Hashimoto;S. Yamazaki;F. Kawakami;H. Shiroki;T. Yamabe
通讯作者：
T. Yamabe
影响因子：
11.9
作者：
Mera, Gabriela;Navrotsky, Alexandra;Riedel, Ralf
通讯作者：
Riedel, Ralf