A new type of nano-sized silicon/carbon composite electrode for reversible lithium insertion

Abstract

A new type of nano-sized silicon/carbon composite was developed. It shows superior electrochemical cycling properties as negative electrode material for possible use in lithium-ion batteries with respect to high reversible and low irreversible capacity, and low fading.

Reversible and High‐Capacity Nanostructured Electrode Materials for Li‐Ion Batteries

“…The second method is similar to the first: bulk or nanometer-sized electrochemically active metals are coated with carbon or are mechanically dispersed in the carbon matrix. [58][59][60][61][62][63][64] Here, the coated or dispersed conducting metal medium act as secondary electrical connector with the Cu current collector when the Si anode particles are pulverized during the lithiation process. These methods utilize zero-dimensional (0D) bulk particles or nanoparticles.…”

Three‐Dimensional Porous Silicon Particles for Use in High‐Performance Lithium Secondary Batteries

“…Intense studies have focused on reducing this volume change by using composites with an inactive carbon phase to prevent the aggregation of particle growth and to act as electrically connecting media between anode particles and the current collector when the particle is pulverized. [2][3][4][5][6][7][8][9][10][11] However, these methods lead to a decrease in the charge capacity to less than 1500 mA h g À1 after dozens of cycles. On the other hand, control of the volume change by control of the morphology of the Si has very rarely been reported.…”

Flexible Dimensional Control of High‐Capacity Li‐Ion‐Battery Anodes: From 0D Hollow to 3D Porous Germanium Nanoparticle Assemblies

“…[23][24][25][26][27][28][29][30] As a consequence, the electrode suffers from cracking and crumbling (pulverization) as well as from a consequent loss of electronic interparticle contact and exfoliation from the current collector. In this regard, porous nanoparticles with ordered pore arrays are the best candidates to minimize and accommodate the volume changes of the metals during lithium alloying and leaching.…”