Using High Energy Density Material in Electrode Design Enhances Lithium Sulfur Batteries
October 2, 2019 | AIP.orgEstimated reading time: 2 minutes

Lithium ion batteries aren’t keeping up with energy demands from higher power electronic devices, electric vehicles and smart electric grids. To develop higher capacity batteries, researchers have looked to lithium sulfur batteries because of sulfur’s high theoretical capacity and energy density.
But there are still several problems to solve before lithium sulfur batteries can be put into practical applications, such as sulfur’s intrinsically low electrical conductivity and the rapid capacity decay caused by polysulfides escaping from the cathode.
The biggest problem is the shuttling effect that occurs during cycling. This effect causes the diffusion of polysulfides from the cathode, creating capacity loss. It also consumes a lot of fresh lithium and electrolytes, and reduces battery performance.
Four varieties of cathode design were tested: a) bare sulfur electrode, b) the partially confined structure PZ67/S, c) the partially confined structure S/PZ67 and d) the fully confined, sandwich structure PZ67/S/PZ67, which outperformed the others in both initial capacity and capacity after battery cycling. CREDIT: Xing Gao, Siwu Li, Ying Du and Bo Wang
To solve the shuttling problem and improve lithium sulfur battery performance, the authors of a paper published in APL Materials, from AIP Publishing, created a sandwich-structured electrode using a novel material that traps polysulfides and increases the reaction kinetics.
ZIF-67 is a metal-organic framework (MOF) constructed from metal ions or metal clusters and organic ligands. It holds great promise in gas storage and separation, catalysis and energy storage. MOF-derived materials are also attractive in energy storage due to their robust structure, porous surface and high conductivity.
A sandwich-structured electrode with sulfur immobilized in between PZ67 layers, PZ67/S/PZ67, improves the practical energy density of the lithium sulfur battery to three to five times higher than that of lithium ion batteries. The PZ67 is composed of polar materials, and the porous carbon showed a synergistic effect in the chemical interaction, served as a physical barrier, offered a high conductivity to prohibit the polysulfide shuttling effect and enhanced the batteries’ cycling performance.
“The porous PZ67 can not only absorb the polysulfides to form a confinement, it can also improve the kinetics of the actual active materials’ reaction during the battery cycling,” author Siwu Li said. “That means it may also improve the discharge voltage of the battery, and that is a big contribution to improving the energy density of the batteries.”
The sandwich-structured electrode that confines soluble polysulfides could be useful for anyone working to confine soluble materials, Li said. His team plans to continue their work in order to scale up the process of fabricating the hybrid electrode using a hot pressing procedure. They also plan to address instabilities on the anode side of lithium sulfur batteries, possibly by adding a protective layer.
Testimonial
"In a year when every marketing dollar mattered, I chose to keep I-Connect007 in our 2025 plan. Their commitment to high-quality, insightful content aligns with Koh Young’s values and helps readers navigate a changing industry. "
Brent Fischthal - Koh YoungSuggested Items
Curing and Verification in PCB Shadow Areas
09/17/2025 | Doug Katze, DymaxDesign engineers know a simple truth that often complicates electronics manufacturing: Light doesn’t go around corners. In densely populated PCBs, adhesives and coatings often fail to fully cure in shadowed regions created by tall ICs, connectors, relays, and tight housings.
Marcy’s Musings: Advancing the Advanced Materials Discussion
09/17/2025 | Marcy LaRont -- Column: Marcy's MusingsAs the industry’s most trusted global source of original content about the electronics supply chain, we continually ask you about your concerns, what you care about, and what you most want to learn about. Your responses are insightful and valuable. Thank you for caring enough to provide useful feedback and engage in dialogue.
September 2025 PCB007 Magazine: The Future of Advanced Materials
09/16/2025 | I-Connect007 Editorial TeamMoore’s Law is no more, and the advanced material solutions being developed to grapple with this reality are surprising, stunning, and perhaps a bit daunting. Buckle up for a dive into advanced materials and a glimpse into the next chapters of electronics manufacturing.
I-Connect007 Launches Advanced Electronics Packaging Digest
09/15/2025 | I-Connect007I-Connect007 is pleased to announce the launch of Advanced Electronics Packaging Digest (AEPD), a new monthly digital newsletter dedicated to one of the most critical and rapidly evolving areas of electronics manufacturing: advanced packaging at the interconnect level.
Panasonic Industry will Double the Production Capacity of MEGTRON Multi-layer Circuit Board Materials Over the Next Five Years
09/15/2025 | Panasonic Industry Co., Ltd.Panasonic Industry Co., Ltd., a Panasonic Group company, announced plans for a major expansion of its global production capacity for MEGTRON multi-layer circuit board materials today. The company plans to double its production over the next five years to meet growing demand in the AI server and ICT infrastructure markets.