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6 results on '"Suo, Liumin"'

1. Dense All‐Electrochem‐Active Electrodes for All‐Solid‐State Lithium Batteries

Author

Massachusetts Institute of Technology. Department of Nuclear Science and Engineering, Massachusetts Institute of Technology. Department of Materials Science and Engineering, Li, Meiying, Liu, Tao, Shi, Zhe, Xue, Weijiang, Hu, Yong‐sheng, Li, Hong, Huang, Xuejie, Li, Ju, Suo, Liumin, Chen, Liquan, Massachusetts Institute of Technology. Department of Nuclear Science and Engineering, Massachusetts Institute of Technology. Department of Materials Science and Engineering, Li, Meiying, Liu, Tao, Shi, Zhe, Xue, Weijiang, Hu, Yong‐sheng, Li, Hong, Huang, Xuejie, Li, Ju, Suo, Liumin, and Chen, Liquan

Abstract

The energy density presents the core competitiveness of lithium (Li)-ion batteries. In conventional Li-ion batteries, the utilization of the gravimetric/volumetric energy density at the electrode level is unsatisfactory (<84 wt% and <62 vol%, respectively) due to the existence of non-electrochemical active parts among the 3D porous electrodes, including electrolytes, binders, and carbon additives. These are regarded as indispensable and irreducible components of the electronic and ionic transport network. Here, a dense “all-electrochem-active” (AEA) electrode for all-solid-state Li batteries is proposed, which is entirely constructed from a family of superior mixed electronic–ionic-conducting cathodes, to minimize the energy density gap between the accessible and theoretical energy density at the electrode level. Furthermore, with the ionic–electronic-conductive network self-supported from the AEA cathode, the dense hybrid sulfur (S)-based AEA electrode exhibits a high compacted filling rate of 91.8%, which indicates a high energy density of 777 W h kg−1 and 1945 W h L−1 at the electrode level based on the total cathodes and anodes when at 70 °C.

Published
2022

2. Fluorine-donating electrolytes enable highly reversible 5-V-class Li metal batteries

Author

Massachusetts Institute of Technology. Department of Materials Science and Engineering, Massachusetts Institute of Technology. Department of Nuclear Science and Engineering, Suo, Liumin, Xue, Weijiang, Wang, Chao, Chen, Yuming, Li, Ju, Gobet, Mallory, Greenbaum, Steve G., Yang, Wanlu, Li, Yangxing, Massachusetts Institute of Technology. Department of Materials Science and Engineering, Massachusetts Institute of Technology. Department of Nuclear Science and Engineering, Suo, Liumin, Xue, Weijiang, Wang, Chao, Chen, Yuming, Li, Ju, Gobet, Mallory, Greenbaum, Steve G., Yang, Wanlu, and Li, Yangxing

Abstract

Lithium metal has gravimetric capacity ∼10× that of graphite which incentivizes rechargeable Li metal batteries (RLMB) development. A key factor that limits practical use of RLMB is morphological instability of Li metal anode upon electrodeposition, reflected by the uncontrolled area growth of solid-electrolyte interphase that traps cyclable Li, quantified by the Coulombic inefficiency (CI). Here we show that CI decreases approximately exponentially with increasing donatable fluorine concentration of the electrolyte. By using up to 7 m of Li bis(fluorosulfonyl)imide in fluoroethylene carbonate, where both the solvent and the salt donate F, we can significantly suppress anode porosity and improve the Coulombic efficiency to 99.64%. The electrolyte demonstrates excellent compatibility with 5-V LiNi0.5Mn1.5O4cathode and Al current collector beyond 5 V. As a result, an RLMB full cell with only 1.4× excess lithium as the anode was demonstrated to cycle above 130 times, at industrially significant loading of 1.83 mAh/cm2and 0.36 C. This is attributed to the formation of a protective LiF nanolayer, which has a wide bandgap, high surface energy, and small Burgers vector, making it ductile at room temperature and less likely to rupture in electrodeposition., National Science Foundation (U.S.) (Grant ECCS-1610806)

Published
2018

3. Phase Transformation and Lithiation Effect on Electronic Structure of LixFePO4: An In-Depth Study by Soft X-ray and Simulations

Author

Liu, Xiaosong, Liu, Jun, Qiao, Ruimin, Yu, Yan, Li, Hong, Suo, Liumin, Hu, Yong-sheng, Chuang, Yi-De, Shu, Guojiun, Chou, Fangcheng, Weng, Tsu-Chien, Nordlund, Dennis, Sokaras, Dimosthenis, Wang, Yung Jui, Lin, Hsin, Barbiellini, Bernardo, Bansil, Arun, Song, Xiangyun, Liu, Zhi, Yan, Shishen, Liu, Gao, Qjao, Shan, Richardson, Thomas J., Prendergast, David, Hussain, Zahid, de Groot, Frank M. F., Yang, Wanli, Liu, Xiaosong, Liu, Jun, Qiao, Ruimin, Yu, Yan, Li, Hong, Suo, Liumin, Hu, Yong-sheng, Chuang, Yi-De, Shu, Guojiun, Chou, Fangcheng, Weng, Tsu-Chien, Nordlund, Dennis, Sokaras, Dimosthenis, Wang, Yung Jui, Lin, Hsin, Barbiellini, Bernardo, Bansil, Arun, Song, Xiangyun, Liu, Zhi, Yan, Shishen, Liu, Gao, Qjao, Shan, Richardson, Thomas J., Prendergast, David, Hussain, Zahid, de Groot, Frank M. F., and Yang, Wanli

Abstract

Through soft X-ray absorption spectroscopy, hard X-ray Raman scattering, and theoretical simulations, we provide the most in-depth and systematic study of the phase transformation and (de)lithiation effect on electronic structure in LixFePO4 nanoparticles and single crystals. Soft X-ray reveals directly the valence states of Fe 3d electrons in the vicinity of Fermi level, which is sensitive to the local lattice distortion, but more importantly offers detailed information on the evolution of electronic states at different electrochemical stages. The soft X-ray spectra of LixFePO4 nanoparticles evolve vividly with the (de)lithiation level. The spectra fingerprint the (de)lithiation process with rich information on Li distribution, valency, spin states, and crystal field. The high resolution spectra reveal a subtle but critical deviation from two-phase transformation in our electrochemically prepared samples. In addition, we performed both first principles calculations and multiplet simulations of the spectra and quantitatively determined the 3d valence states that are completely redistributed through (de)lithiation. This electronic reconfiguration was further verified by the polarization-dependent spectra collected on LiFePO4 single crystals, especially along the lithium diffusion direction. The evolution of the 3d states is overall consistent with the local lattice distortion and provides a fundamental picture of the (de)lithiation effects on electronic structure in the LixFePO4 system.

Published
2012

4. Phase Transformation and Lithiation Effect on Electronic Structure of LixFePO4: An In-Depth Study by Soft X-ray and Simulations

Author

Sub Inorganic Chemistry and Catalysis, Inorganic Chemistry and Catalysis, Liu, Xiaosong, Liu, Jun, Qiao, Ruimin, Yu, Yan, Li, Hong, Suo, Liumin, Hu, Yong-sheng, Chuang, Yi-De, Shu, Guojiun, Chou, Fangcheng, Weng, Tsu-Chien, Nordlund, Dennis, Sokaras, Dimosthenis, Wang, Yung Jui, Lin, Hsin, Barbiellini, Bernardo, Bansil, Arun, Song, Xiangyun, Liu, Zhi, Yan, Shishen, Liu, Gao, Qjao, Shan, Richardson, Thomas J., Prendergast, David, Hussain, Zahid, de Groot, Frank M. F., Yang, Wanli, Sub Inorganic Chemistry and Catalysis, Inorganic Chemistry and Catalysis, Liu, Xiaosong, Liu, Jun, Qiao, Ruimin, Yu, Yan, Li, Hong, Suo, Liumin, Hu, Yong-sheng, Chuang, Yi-De, Shu, Guojiun, Chou, Fangcheng, Weng, Tsu-Chien, Nordlund, Dennis, Sokaras, Dimosthenis, Wang, Yung Jui, Lin, Hsin, Barbiellini, Bernardo, Bansil, Arun, Song, Xiangyun, Liu, Zhi, Yan, Shishen, Liu, Gao, Qjao, Shan, Richardson, Thomas J., Prendergast, David, Hussain, Zahid, de Groot, Frank M. F., and Yang, Wanli

Published
2012

5. Phase Transformation and Lithiation Effect on Electronic Structure of LixFePO4: An In-Depth Study by Soft X-ray and Simulations

Author

Sub Inorganic Chemistry and Catalysis, Inorganic Chemistry and Catalysis, Liu, Xiaosong, Liu, Jun, Qiao, Ruimin, Yu, Yan, Li, Hong, Suo, Liumin, Hu, Yong-sheng, Chuang, Yi-De, Shu, Guojiun, Chou, Fangcheng, Weng, Tsu-Chien, Nordlund, Dennis, Sokaras, Dimosthenis, Wang, Yung Jui, Lin, Hsin, Barbiellini, Bernardo, Bansil, Arun, Song, Xiangyun, Liu, Zhi, Yan, Shishen, Liu, Gao, Qjao, Shan, Richardson, Thomas J., Prendergast, David, Hussain, Zahid, de Groot, Frank M. F., Yang, Wanli, Sub Inorganic Chemistry and Catalysis, Inorganic Chemistry and Catalysis, Liu, Xiaosong, Liu, Jun, Qiao, Ruimin, Yu, Yan, Li, Hong, Suo, Liumin, Hu, Yong-sheng, Chuang, Yi-De, Shu, Guojiun, Chou, Fangcheng, Weng, Tsu-Chien, Nordlund, Dennis, Sokaras, Dimosthenis, Wang, Yung Jui, Lin, Hsin, Barbiellini, Bernardo, Bansil, Arun, Song, Xiangyun, Liu, Zhi, Yan, Shishen, Liu, Gao, Qjao, Shan, Richardson, Thomas J., Prendergast, David, Hussain, Zahid, de Groot, Frank M. F., and Yang, Wanli

Published
2012

6. Phase Transformation and Lithiation Effect on Electronic Structure of LixFePO4: An In-Depth Study by Soft X-ray and Simulations

Author

Sub Inorganic Chemistry and Catalysis, Inorganic Chemistry and Catalysis, Liu, Xiaosong, Liu, Jun, Qiao, Ruimin, Yu, Yan, Li, Hong, Suo, Liumin, Hu, Yong-sheng, Chuang, Yi-De, Shu, Guojiun, Chou, Fangcheng, Weng, Tsu-Chien, Nordlund, Dennis, Sokaras, Dimosthenis, Wang, Yung Jui, Lin, Hsin, Barbiellini, Bernardo, Bansil, Arun, Song, Xiangyun, Liu, Zhi, Yan, Shishen, Liu, Gao, Qjao, Shan, Richardson, Thomas J., Prendergast, David, Hussain, Zahid, de Groot, Frank M. F., Yang, Wanli, Sub Inorganic Chemistry and Catalysis, Inorganic Chemistry and Catalysis, Liu, Xiaosong, Liu, Jun, Qiao, Ruimin, Yu, Yan, Li, Hong, Suo, Liumin, Hu, Yong-sheng, Chuang, Yi-De, Shu, Guojiun, Chou, Fangcheng, Weng, Tsu-Chien, Nordlund, Dennis, Sokaras, Dimosthenis, Wang, Yung Jui, Lin, Hsin, Barbiellini, Bernardo, Bansil, Arun, Song, Xiangyun, Liu, Zhi, Yan, Shishen, Liu, Gao, Qjao, Shan, Richardson, Thomas J., Prendergast, David, Hussain, Zahid, de Groot, Frank M. F., and Yang, Wanli

Published
2012

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