title: Improvement of desolvation and resilience of alginate binders for Si-based anodes in a lithium ion battery by calcium-mediated cross-linking.
abstract: Si-based anodes in lithium ion batteries (LIBs) have exceptionally high theoretical capacity, but the use of a Si-based anode in LIBs is problematic because the charging-discharging process can fracture the Si particles. Alginate and its derivatives show promise as Si particle binders in the anode. We show that calcium-mediated "egg-box" electrostatic cross-linking of alginate improves toughness, resilience, electrolyte desolvation of the alginate binder as a Si-binder for LIBs. Consequently, the improved mechanical properties of the calcium alginate binder compared to the sodium alginate binder and other commercial binders extend the lifetime and increase the capacity of Si-based anodes in LIBs.
authors.affiliation: Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea. jinwoo03@postech.ac.kr.
authors.forename: Jihee
authors.initials: J
authors.lastname: Yoon
authors.forename: Dongyeop X
authors.initials: DX
authors.lastname: Oh
authors.forename: Changshin
authors.initials: C
authors.lastname: Jo
authors.forename: Jinwoo
authors.initials: J
authors.lastname: Lee
authors.forename: Dong Soo
authors.initials: DS
authors.lastname: Hwang
mesh_terms: D000464:Alginates / Q000737:chemistry*; D002118:Calcium / Q000737:chemistry*; D011211:Electric Power Supplies; D004563:Electrochemistry; D004566:Electrodes; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D008094:Lithium / Q000737:chemistry*; D055595:Mechanical Phenomena; D012825:Silicon / Q000737:chemistry*; D055672:Static Electricity; D013816:Thermodynamics
chemical_list: D000464:Alginates; D006603:Hexuronic Acids; D020723:Glucuronic Acid; D008094:Lithium; D002118:Calcium; D012825:Silicon