A "Sticky" Mucin-Inspired DNA-Polysaccharide Binder for Silicon and Silicon-Graphite Blended Anodes in Lithium-Ion Batteries

Advanced Materials
Sunjin KimJang Wook Choi

Abstract

New binder concepts have lately demonstrated improvements in the cycle life of high-capacity silicon anodes. Those binder designs adopt adhesive functional groups to enhance affinity with silicon particles and 3D network conformation to secure electrode integrity. However, homogeneous distribution of silicon particles in the presence of a substantial volumetric content of carbonaceous components (i.e., conductive agent, graphite, etc.) is still difficult to achieve while the binder maintains its desired 3D network. Inspired by mucin, the amphiphilic macromolecular lubricant, secreted on the hydrophobic surface of gastrointestine to interface aqueous serous fluid, here, a renatured DNA-alginate amphiphilic binder for silicon and silicon-graphite blended electrodes is reported. Mimicking mucin's structure comprised of a hydrophobic protein backbone and hydrophilic oligosaccharide branches, the renatured DNA-alginate binder offers amphiphilicity from both components, along with a 3D fractal network structure. The DNA-alginate binder facilitates homogeneous distribution of electrode components in the electrode as well as its enhanced adhesion onto a current collector, leading to improved cyclability in both silicon and silicon-grap...Continue Reading

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Citations

Nov 26, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Yi ZhangGuanglei Wu
Sep 2, 2020·Advanced Materials·Seong Kwang HongKeon Jae Lee
May 2, 2019·Chemistry : a European Journal·Yiyang PanPeng-Fei Cao
Aug 3, 2021·Advanced Materials·Chang-Heum JoSeung-Taek Myung
Jan 3, 2019·ACS Applied Materials & Interfaces·Jin-Yi LiYu-Guo Guo
Mar 23, 2019·ACS Applied Materials & Interfaces·Rongnan GuoWei-Qiang Han
Jun 28, 2019·ACS Nano·You Kyeong Jeong, Jang Wook Choi

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