FeSO₄ as a Novel Li-Ion Battery Cathode

Abstract

FeSO4 has the characteristics of low cost and theoretical high energy density (799 W⋅h⋅kg−1 with a two-electron reaction), which can meet the demand for next-generation lithium-ion batteries. Herein, FeSO4 as a novel high-performance conversion-reaction type cathode is investigated. We use dopamine as a carbon coating source to increase its electronic conductivity. FeSO4@C demonstrates a high reversible specific capacity (512 mA⋅h⋅g−1) and a superior cycling performance (482 mA⋅h⋅g−1 after 250 cycles). In addition, we further study its reaction mechanism. The FeSO4 is converted to Fe and Li2SO4 during lithium ion insertion and the Fe|Li2SO4 grain boundaries further store additional lithium ions. Our findings are valuable in exploring other new conversion-type lithium ion battery cathodes.

Two-dimensional CrP2 with high specific capacity and fast charge rate for lithium-ion battery

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Unexpected Selective Absorption of Lithium in Thermally Reduced Graphene Oxide Membranes

“…Lithium plays an increasingly important role in scientific and industrial processes, e.g., used for storage equipment, [1−3] lithium-ion batteries (LIBs), [4,5] alloy technology, [6,7] glass, [8] and ceramics, [9] resulting in a rapidly growing demand for lithium resources from extraction and recovery. [10−14] Almost 60% of the world's lithium is contained in salt lake brines, which are regarded as the primary source of lithium.…”