A Review of Metal Silicides for Lithium-Ion Battery Anode Application

Transition metal oxides gain considerable research attentions as potential anode materials for lithium ion batteries, but their applications are hindered due to their poor electronic conductivity, weak cycle stability and drastic volume change. Here, a NiO@graphene composite with a unique 3D conductive network structure is prepared through a simple strategy. When applied as anode material for Li-ion batteries, at 50 mA g −1 , the NiO@graphene displays a high reversible capacity of 1366 mAh g −1 and a stable cyclability of 205 mAh g −1 after 500 cycles. Even at a high rate of 10 A g −1 , it displays a favorable reversible capacity of 711 mAh g −1 . Remarkably, when it recovers back to 0.05 A g −1 , a reversible capacity of 1741 mAh g −1 is achieved. Thus, the NiO@graphene composite with 3D structure shows good application prospects as an alternative anode for advanced lithium ion batteries.

Section: Introductionmentioning

confidence: 99%

Facile Preparation of NiO@graphene Nanocomposite with Superior Performances as Anode for Li-ion Batteries

Yang

et al. 2021

“…After coating PDA, the general morphology of the material does not change, and still maintains the nano-cubic structure shown in Fig. 3c (1)] had a reduction reaction [34,35], and a solid electrolyte interface (SEI) membrane was formed. This potential is mainly determined by the generation potential of SEI membrane.…”

Section: Resultsmentioning

confidence: 99%

“…Owing to eco-friendly, high energy density and long cycling stability without memory effect, lithium-ion batteries (LIB) have been extensively used as rechargeable energy storage systems for portable electronic devices and electric vehicles. However, with the improvement of performance requirements for electronic products, LIB has been unable to satisfy the requirements of higher capacity and energy density due to the low theoretical capacity (about 372 mAh/g) of graphite as a positive electrode material [1][2][3]. Compared with graphite, metal oxide, metal sulfide, metal nitride and other materials have extremely high specific capacity for LIB anode material [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Metal Oxides@C (Metal = Ni, Fe) Based Prussian Blue Analogs as a High-performance Anode Material for Lithium-ion Battery

Yang

Zhao

et al. 2021

Ni 3 [Fe(CN) 6 ] 2 nano-cubic precursors were prepared by chemical coprecipitation at room temperature with nickel acetate and potassium ferricyanide as raw materials. The corresponding NiFe 2 O 4 -NiO@C composites with excellent crystallization were prepared by two-stage oxidation at low temperature. The microstructure and electrochemical behavior of the materials showed that the Prussian blue analog was transformed into metal oxide while the carbon coating was maintained in the twostage oxidation at low temperature. The existence of the carbon coating reduces the charge transfer impedance to 31.5 Ω. At the current density of 500 mA/g, the reversible capacity of 632.7 mAh/g is maintained after 500 cycles. At the same time, carbon cladding can also enhance the role of pseudocapacitance in the material. At the scanning rate of 0.1 mV/s, the pseudocapacitance account for 54.4% of the total discharge capacity, which is significantly higher than that of uncoated materials.

“…Although Lithium ion batteries (LIBs) are considered as one of the attractive rechargeable batteries, they cannot satisfy the everincreasing electric storage demands [2]. Thus, the development of batteries with high gravimetric and volumetric energy and power density has stimulated the intense research interest in recent years [3]. Lithium metal batteries (LMBs) are quite indispensable for the next-generation energy storage devices owing to the high theoretical capacity of lithium metal anode (3860 mAh g −1 ) [4].…”

Section: Introductionmentioning

confidence: 99%

Effect of LiTFSI and LiFSI on Cycling Performance of Lithium Metal Batteries Using Thermoplastic Polyurethane/Halloysite Nanotubes Solid Electrolyte

Shen

Zhong

Xie

et al. 2021

All-solid-state lithium batteries (ASSLB) are promising candidates for next-generation energy storage devices. Nevertheless, the large-scale commercial application of high energy density ASSLB with the polymer electrolyte still faces challenges. In this study, a thin solid polymer composite electrolyte (SPCE) is prepared through a facile and cost-effective strategy with an infiltration of thermoplastic polyurethane (TPU), lithium salt (LiTFSI or LiFSI), and halloysite nanotubes (HNTs) in a porous framework of polyethylene separator (PE) (TPU-HNTs-LiTFSI-PE or TPU-HNTs-LiFSI-PE). The composition, electrochemical performance, and especially the effect of anions (TFSI − and FSI − ) on cycling performance are investigated. The results reveal that the flexible TPU-HNTs-LiTFSI-PE and TPU-HNTs-LiFSI-PE with a thickness of 34 μm exhibit wide electrochemical windows of 4.9 and 5.1 V (vs. Li + /Li) at 60 ℃, respectively. Reduction in FSI − tends to form more LiF and sulfur compounds at the interface between TPU-HNTs-LiFSI-PE and Li metal anode, thus enhancing the interfacial stability. As a result, cell composed of TPU-HNTs-LiFSI-PE exhibits a smaller increase in interfacial resistance of solid electrolyte interphase (SEI) with a distinct decrease in charge-transfer resistance during cycling. Li|Li symmetric cell with TPU-HNTs-LiFSI-PE could keep its stable overpotential profile for nearly 1300 h with a low hysteresis of approximately 39 mV at a current density of 0.1 mA cm −2 , while a sudden voltage rise with internal cell impedance-surge signals was observed within 600 h for cell composed of TPU-HNTs-LiTFSI-PE. The initial capacities of NCM|TPU-HNTs-LiTFSI-PE|Li and NCM|TPU-HNTs-LiFSI-PE|Li cells were 149 and 114 mAh g −1 , with capacity retention rates of 83.52% and 89.99% after 300 cycles at 0.5 C, respectively. This study provides a valuable guideline for designing flexible SPCE, which shows great application prospect in the practice of ASSLB.