Resilient carbon encapsulation of iron pyrite (FeS2) cathodes in lithium ion batteries

Facile Synthesis of FeS2 Quantum‐Dots/Functionalized Graphene‐Sheet Composites as Advanced Anode Material for Sodium‐ion Batteries

“…Therefore, in recent years, great efforts have been devoted to the research of sodium-ion batteries to obtain low cost, high capacity, and long cycling life batteries providing better performance to meet the demands of EVs, HEVs and EES. [8][9][10] Apart from the using of the cheap sodium, the electrode materials should be inexpensive, accessible, and abundant.…”

Mechanism and Solution for the Capacity Fading of Li/FeS2Battery

“…8 After this, the resultant sulfur serves as an independent cathode material and hence induces the same problems as observed in the conventional Li/S cells, such as dissolution of lithium polysulfide (Li 2 S n with n > 2), redox shuttle, and other resultant parasitic reactions. 15 Based on the above redox mechanism, the C-FeS 2 composites [16][17][18][19][20][21] and carbon-modified/wrapped FeS 2 materials [22][23][24][25] with various novel structures, such as nanocrystals, 4 microspheres 26,27 and core-shell structures, 28 have been widely synthesized to improve the cyclability and power capability of the Li/FeS 2 cells. On the other hand, the solid-state electrolyte, 11,[29][30][31][32] polymer composite electrolyte, 6,11,29,30 and ionic liquid 33 have been proposed to prevent the dissolution of Li 2 S n .…”

An Electrospun Core–Shell Nanofiber Web as a High‐Performance Cathode for Iron Disulfide‐Based Rechargeable Lithium Batteries

“…However,t he poor structural stability,l ow conductivity,a nd sluggish kinetics of FeS 2 cathodes developedt hus far limit their practical capacity and cycling stability. [7,[26][27][28][29][30][31][32] Alternative electrolytes with reduced solubility of polysulfides and improved interfacial compatibility with lithium metal anodesh ave also been investigated in detail. [12][13][14][15] Furthermore, huge volume changes ( % 164.2 %) and continuous aggregation of Fe particles that occur upon cycling accelerate capacityd egradation in FeS 2 electrodes.…”

“…[13,16] Recent research and development efforts to enhancet he electrochemical properties of FeS 2 have been mainly focused on fabricating porous structures, [8,17] utilizingc onductive carbons such as graphene, [18][19][20][21][22] introducing transition metal dopants, [23][24][25] and employing carbon or polymer matrices for effective active materiale ncapsulation. [7,[26][27][28][29][30][31][32] Alternative electrolytes with reduced solubility of polysulfides and improved interfacial compatibility with lithium metal anodesh ave also been investigated in detail. [33][34][35][36] Although these approaches have significantly improved the reversibility and cycle performance of pyrite-based materials, highr ate-capability and long cycle life with adequate capacity retention still remain challenging.…”