Demonstration of high current densities and extended cycling in the garnet Li7La3Zr2O12 solid electrolyte
By Nathan J. Taylor, Sandra Stangeland-Molo, Catherine G. Haslam, Asma Sharafi, T. Thompson, Michael J. Wang, Regina García-Méndez, J. Sakamoto. Journal of Power Sources, 2018
137 citations recorded by the source corpus.
Abstract Replacing state-of-the-art graphite with metallic Li anodes could dramatically increase the energy density of Li-ion technology. However, efforts to achieve uniform Li plating and stripping in conventional liquid electrolytes have had limited success. An alternative approach is to use a solid electrolyte to stabilize the Li interface during cycling. One of the most promising solid electrolytes is Li 7 La 3 Zr 2 O 12 , which has high ionic conductivity at room temperature, high shear modulus and chemical and electrochemical stability against Li. Despite these properties, Li filament propagation has been observed through LLZO at current densities below what is practical. By combining recent achievements in reducing interface resistance and optimizing microstructure, we demonstrate Li cycling at current densities competitive with Li-ion. Li|LLZO|Li cells are capable of cycling at up to 0.9 ± 0.7 mA cm −2 , 3.8 ± 0.9 mA cm −2 , and 6.0 ± 0.7 mA cm -2 at room temperature, 40 and 60 °C, respectively. Extended stability is shown in Li plating/stripping tests that passed 3 mAh cm −2 charge per cycle for a cumulative capacity of 702 mAh cm −2 using a 1 mA cm −2 current density. These results demonstrate that solid-state batteries using metallic Li anodes can approach charge/discharge rates and cycling stability comparable to SOA Li-ion.
Subfields: Automotive Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/44d05c1742badb68f9a9505e56daeefb4751e6a0
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Automotive Engineering
In Electrical and Electronic Engineering
Citations in the corpus
- Characterizing the Li-Solid-Electrolyte Interface Dynamics as a Function of Stack Pressure and Current Density (2019, methodology): “Furthermore, it has been demonstrated that the LLZO electrolyte can be synthesized at high relative densities (> 95%) and low Rint without the need for interfacial modifications(3,12) and have well-defined regimes for stable and unstable Li plating.(3,8)”