TY - JOUR
T1 - Enhanced electrochemical performance of bulk type oxide ceramic lithium batteries enabled by interface modification
AU - LIU, Ting
AU - ZHANG, Yibo
AU - ZHANG, Xue
AU - WANG, Lei
AU - ZHAO, Shi-Xi
AU - LIN, Yuan-Hua
AU - SHEN, Yang
AU - LUO, Jun
AU - LI, Liangliang
AU - NAN, Ce-Wen
N1 - This work was supported by the National Natural Science Foundation of China (Grant No. 51532002 and 51572149), the National Program for Thousand Young Talents of China, the Tianjin Municipal Science and Technology Commission (15JCYBJC52600), and the Tianjin Municipal Education Commission. We thank Dr Yaoyu Ren at Tsinghua University and Dr Yuan Dong at University of Science and Technology Beijing for their help on TEM experiments. We also thank Yuxiu Hao at Tsinghua University for her help on the schematic diagram.
PY - 2018
Y1 - 2018
N2 - The interface issue is one of the severe problems in all-solid-state (ASS) batteries, especially for oxide-type batteries with a full ceramic structure. Rigid interfacial contact between electrodes and electrolyte and poor mechanical properties of ceramics limit the choices of applicable materials and fabrication processes for ASS batteries. In this report, a bulk type ASS lithium battery with an initial discharge capacity of 112.7 mA h g-1 is successfully fabricated. A garnet-structured Li6.75La3Zr1.75Ta0.25O12 (LLZO-Ta) ceramic pellet is used as the solid electrolyte. A slurry of a composite cathode consisting of Li[Ni0.5Co0.2Mn0.3]O2, In2(1-x)Sn2xO3, Li3BO3, and polyvinylidene fluoride was tape-cast on the LLZO-Ta pellet and annealed to improve the interfacial contact among the particles in the composite cathode as well as between the composite cathode and the electrolyte pellet. Without the surface modification of a Li[Ni0.5Co0.2Mn0.3]O2 active material, an obvious degradation of discharge capacity due to polarization is observed during cycling. When a layer of a Li-Ti-O precursor is coated on the surface of Li[Ni0.5Co0.2Mn0.3]O2 particles, in situ spinel Li[Ti0.1Mn0.9]2O4 is formed at the surface after annealing, leading to an enhancement of discharge capacity of the battery and great improvement for cycling stability. This novel method of interface modification reduces the interfacial polarization with an enhanced Li+ transfer between the cathode and the electrolyte. Our experimental results reveal that the interface engineering by means of reasonable regulation on the surface constituent of electrode materials can effectively improve the capacity and cycling stability of ASS lithium batteries.
AB - The interface issue is one of the severe problems in all-solid-state (ASS) batteries, especially for oxide-type batteries with a full ceramic structure. Rigid interfacial contact between electrodes and electrolyte and poor mechanical properties of ceramics limit the choices of applicable materials and fabrication processes for ASS batteries. In this report, a bulk type ASS lithium battery with an initial discharge capacity of 112.7 mA h g-1 is successfully fabricated. A garnet-structured Li6.75La3Zr1.75Ta0.25O12 (LLZO-Ta) ceramic pellet is used as the solid electrolyte. A slurry of a composite cathode consisting of Li[Ni0.5Co0.2Mn0.3]O2, In2(1-x)Sn2xO3, Li3BO3, and polyvinylidene fluoride was tape-cast on the LLZO-Ta pellet and annealed to improve the interfacial contact among the particles in the composite cathode as well as between the composite cathode and the electrolyte pellet. Without the surface modification of a Li[Ni0.5Co0.2Mn0.3]O2 active material, an obvious degradation of discharge capacity due to polarization is observed during cycling. When a layer of a Li-Ti-O precursor is coated on the surface of Li[Ni0.5Co0.2Mn0.3]O2 particles, in situ spinel Li[Ti0.1Mn0.9]2O4 is formed at the surface after annealing, leading to an enhancement of discharge capacity of the battery and great improvement for cycling stability. This novel method of interface modification reduces the interfacial polarization with an enhanced Li+ transfer between the cathode and the electrolyte. Our experimental results reveal that the interface engineering by means of reasonable regulation on the surface constituent of electrode materials can effectively improve the capacity and cycling stability of ASS lithium batteries.
UR - http://www.scopus.com/inward/record.url?scp=85043761289&partnerID=8YFLogxK
U2 - 10.1039/c7ta06833f
DO - 10.1039/c7ta06833f
M3 - Journal Article (refereed)
AN - SCOPUS:85043761289
SN - 2050-7488
VL - 6
SP - 4649
EP - 4657
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 11
ER -
