• Liu, Yuhgene
• Han, Sang Yun
• Lewis, John A.
• Chen, Timothy
• Wang, Congcheng
• Klein, Emily J.
• Yoon, Sun Geun
• Prakash, Dhruv
• Kang, Dae Hoon
• Majumdar, Diptarka

Abstract

<jats:title>Abstract</jats:title><jats:p>Metal negative electrodes that alloy with lithium have high theoretical charge storage capacity and are ideal candidates for developing high-energy rechargeable batteries. However, such electrode materials show limited reversibility in Li-ion batteries with standard non-aqueous liquid electrolyte solutions. To circumvent this issue, here we report the use of non-pre-lithiated aluminum-foil-based negative electrodes with engineered microstructures in an all-solid-state Li-ion cell configuration. When a 30-μm-thick Al<jats:sub>94.5</jats:sub>In<jats:sub>5.5</jats:sub>negative electrode is combined with a Li<jats:sub>6</jats:sub>PS<jats:sub>5</jats:sub>Cl solid-state electrolyte and a LiNi<jats:sub>0.6</jats:sub>Mn<jats:sub>0.2</jats:sub>Co<jats:sub>0.2</jats:sub>O<jats:sub>2</jats:sub>-based positive electrode, lab-scale cells deliver hundreds of stable cycles with practically relevant areal capacities at high current densities (6.5 mA cm<jats:sup>−2</jats:sup>). We also demonstrate that the multiphase Al-In microstructure enables improved rate behavior and enhanced reversibility due to the distributed LiIn network within the aluminum matrix. These results demonstrate the possibility of improved all-solid-state batteries via metallurgical design of negative electrodes while simplifying manufacturing processes.</jats:p>

Topics

• impedance spectroscopy
• microstructure
• aluminium
• Lithium