Stabilization of Sn Anode through Structural Reconstruction of a Cu–Sn Intermetallic Coating Layer

Abstract

Lithium-ion batteries (LIBs) are the most popular and well-commercialized power source for portable electronics. They are gradually making their way to applications in electric vehicles (EVs) and smart grids system with the compelling advantages of high energy density and long cycle life. [1-3] However, the power and energy densities of LIBs are currently considered insufficient to meet the demanding requirements for EVs and other energy storage applications. [4-6] In most commercially available LIBs, graphite-based materials are the mainstream anodes. Nevertheless, the graphite-based anodes are facing a serious bottleneck, because a very limited energy output is delivered for LIBs due to their low theoretical capacity (372 mAh g −1). [7,8] As a consequence, it is vital to develop new types of anode materials with superior capacity performance to replace graphite anodes to build nextgeneration high-performance LIBs. Among the recently examined alternative anodes, the alloying-type anode materials (such as Si, Sn, Al), which operate

Formation of hollow MoO 2 @C nano‐octahedrons using polyoxometalate‐based metal‐organic framework as a template for enhanced lithium‐ion batteries

“…In addition, these materials separate the cathode in direct contact from the electrolyte, avoiding a series of reactions at the interface of the electrode‐electrolyte. So that the rate performance of the MoO 2 @C material is improved greatly 81,82 . After long‐term charge/discharge processes, the structure of hollow MoO 2 @C nano‐octahedrons is still keeping (see ESI, Figure S8).…”

“…The GCD curves of the MoO 2 @C electrode deviate from the symmetrical triangle, and the MoO 2 @C electrode has a long charging and discharging time, which means that the specific capacitance of the electrode is large. 83 The variation of specific capacitance value with the current density is shown in Figure S9c. With the increase of current density, the redox reaction rate slows down and its capacitance decreases.…”

Sodium-Ion Battery Anode Construction with SnP x Crystal Domain in Amorphous Phosphorus Matrix

“…The continuous amorphous matrix can also promote the uniform formation of charge/discharge products by tuning the nucleation process [39]. Moreover, one component in the composite may attenuate the volume change, inherent stress, and mechanical instability of another component because of their asynchronous and distinct reactions [40]. With the elegant synergy of crystalline and amorphous structures, composite C3 is expected to deliver better electrochemical performance than that of the all-crystalline or all-amorphous P-/Sn-based anode materials.…”

Rational Design and in-situ Synthesis of Ultra-Thin β-Ni(OH)2 Nanoplates for High Performance All-Solid-State Flexible Supercapacitors

“…To further understand the charge storage mechanism of as-prepared ultra-thin β-Ni(OH) 2 nanoplates, the capacity contribution category is discussed in detail. According to the CV curves, the peak current (i, mA) and scan rate (v, mV s −1 ) obey the following functional relationship (Ju et al, 2020;Wang et al, 2020):…”