High-performance Si Mn/C composite anodes with integrating inactive Mn4Si7 alloy for lithium-ion batteries

Integration of Graphite and Silicon Anodes for the Commercialization of High‐Energy Lithium‐Ion Batteries

“…Va rious kinds of high-capacity Si materials have been investigated for the fabrication of graphite-blended electrodes.H ere,w ei ntroduce several representative studies on graphite-blended Si anodes,including acombination of active Si and an inactive matrix such as silicon monoxide (SiO x ), [48] Si-metal alloys, [49] and porous Si. [22c, 50] Thes tudies aimed at alleviating volume changes through the following strategies: 1) introduction of am echanical buffer matrix and 2) formation of void spaces for accommodating Si expansion.…”

“…It has been widely known that SiO x and Si-metal alloys exhibit high specific capacities of 1300-1500 and 800-1300 mAh g À1 ,r espectively. [48,49] They effectively alleviate the volume change by surrounding the nano-Si with amechanical buffer matrix (amorphous SiO 2 or metal silicides) on (de)lithiation. ForS iO x ,a morphous SiO 2 generates undesirable irreversible by-products,i ncluding Li 2 O [51] and Li 4 SiO 4 , [52] so optimization of the oxygen content in the SiO x has been am ajor issue in terms of its cycling behavior.…”

Top‐Down Synthesis of Silicon/Carbon Composite Anode Materials for Lithium‐Ion Batteries: Mechanical Milling and Etching

“…Despite the merits of nanostructured Si, most of them share the common shortcomings of high preparation costs, low tap density, and low CE, which hinder their commercial applications in LIBs. Si–metal alloys were also investigated as one of the solutions to circumvent the major issues of Si. In addition to the highlighted strategies, novel conductive polymer binders such as polyaniline (PANi) hydrogels, poly(3,4‐ethylenedioxythiophene):poly(styrene‐4‐sulfonate) (PEDOT:PSS), poly(aniline‐ co ‐anthranilic acid) (PAAA), and electrolyte additives such as fluoroethylene carbonate (FEC) and vinylene carbonate (VC) were also utilized to improve the electrochemical performance of Si‐based anodes.…”

Graphit‐ und‐Silicium‐Anoden für Lithiumionen‐ Hochenergiebatterien

“…Einige repräsentative Graphit-Si-Mischungen fürA noden werden wir hier vorstellen, die z. B. eine Kombination aus aktivem Si und inaktiver Matrix wie Siliciummonoxid (SiO x ), [48] Si-Metall-Legierungen [49] und porçses Si beinhalten. [22c, 50] Die betreffenden Studien basierten auf diesen Minderungsstrategien fürV olumenänderungen:1 )eine mechanische Puffermatrix sowie 2) Hohlräume zur Aufname der Volumenänderung der Aktivmaterialien.…”

“…SiO x und Si-Metall-Legierungen besitzen hohe spezifische Kapazitäten von 1300-1500 bzw.8 00-1300 mAh g À1 . [48,49] Sie kçnnen die Volumenänderung bei der (De-)Lithiierung vermindern, indem sie das Nano-Si als mechanische Puffermatrix umschließen (amorphes SiO 2 oder Metallsilicide). Im Fall von SiO x führt amorphes SiO 2 zu unerwünschten und irreversiblen Nebenprodukten wie Li 2 O [51] und Li 4 SiO 4 , [52] FeCuSi zeigte eine spezifische Anfangskapazitätv on 1287 mAh g À1 mit einem hohen coulombschen Anfangswirkungsgrad von 91 %.…”