Maintaining structural integrity of 4.5 V lithium cobalt oxide cathode with fumaronitrile as a novel electrolyte additive

Wang, Xianshu; Zheng, Xiongwen; Liao, Youhao; Huang, Qiming; Xing, Lidan; Xu, Mengqing; Li, Weishan

doi:10.1016/j.jpowsour.2016.10.103

Cited by 112 publications

(71 citation statements)

References 55 publications

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“…此外, 研究者发现, SN (75, 图 17) [179] 、ECH (76, 图 17) [180] 及 FN (77, 图 17) [181] 结构中强电负性的 CN 可与 LCO、NMC 等金属氧化物表面发生强络合作用形成 CN-Co 键, 抑制电解液直接接触正极, 从而提高了正极/电解液界面的热稳定性 [182] . 其中 ECH 结构中引入烷氧基, 进一步提高其离子电导率.…”

Section: 其它含硫添加剂unclassified

Review of Electrolyte Additives for Ternary Cathode Lithium-ion Battery

Deng¹,

Sun²,

Wan³

et al. 2018

Acta Chim. Sinica

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, M＝Mn, NMC; M＝Al, NCA)} are one of the most promising cathode materials of lithium-ion batteries (LIBs). However, in the traditional electrolyte system, they will undergo dramatic structural changes and interface side reactions at high potential and high temperature, which will bring great challenges to their practical application, especially for their cycle life and safety. Developing appropriate electrolyte additive is one of the most economical and effective methods to improve the electrochemical performance of LIBs. Based on the intrinsic structure of material, electrolyte additives used for NMC and NCA ternary cathode and their reaction mechanism in the past 5 years are reviewed in this paper, which include vinylene carbonate (VC), fluoro-compounds, new lithium salts, P-based, B-based, S-based, nitrile, others and combinative additives. Among them, VC becomes a kind of universal additive, which can improve the efficiency and cycle life at low voltage and normal temperature. Fluoro-compounds have been developed from mono substituted such as Fluorinated ethylene carbonate (FEC) to multi-fluorine substituted, which can improve the stability of electrode/electrolyte interface under high voltage. New lithium salt additives are mainly used to improve the film forming performance under high voltage and high temperature, such as Lithium bis(fluorosulfonyl)imide (LiFSI), Lithium difluorophosphate (LiDFP). P-contained additives [such as Tris(trimethylsilyl)phosphite (TMSPi)] are mainly to improve the stability of anode-electrolyte interface, and it has obvious synergistic effect when they combined with additives such as VC. B-contained additives are mainly used to improve the dissociation degree and stability of lithium salt, such as Tris(trimethylsilyl)borate (TMSB). S-contained additives are mainly used to improve the ionic conductivity and stability of anode SEI film, such as Prop-1-ene-1,3-sultone (PES). Nitriles are benefited from the strong electron withdrawing effect of -CN, which can improve the stability of the electrode/electrolyte interface at high voltage. Other types of additives are some heterocyclic compounds having film forming ability and various silanes which can eliminate HF and H 2 O. Combinative additives are developed from VC based composite to PES and PBF (pyridine boron trifluoride) system, which can endure even harsher conditions.

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Section: 其它含硫添加剂unclassified

Review of Electrolyte Additives for Ternary Cathode Lithium-ion Battery

Deng¹,

Sun²,

Wan³

et al. 2018

Acta Chim. Sinica

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“…Notably, several suitable strategies, including coating with carbonaceous materials and TiO 2 , doping a spinel phase on the surface of porous materials, or using functional additives, are often applied to generate hierarchically porous micro‐/nanomaterials with improved electrochemical performance. For example, Wang et al synthesized carbon‐coated α‐Fe 2 O 3 hollow nanohorns onto carbon nanotube (CNT) backbones to enhance electron transport and prevent agglomeration.…”

Section: Applications Of Hierarchically Porous Micro‐/nanostructuresmentioning

confidence: 99%

“…A reversible capacity of 263 mA h g −1 at 6000 mA g −1 was achieved for Mn 2 O 3 @TiO 2 , whereas unmodified Mn 2 O 3 exhibited a value of only 9.7 mA h g −1 . Moreover, using additives in electrolytes is one of the most effective approaches to enhance the electrochemical performance of electrode materials because of the in situ formation of a uniform interphase film that isolates direct contact between the electrolyte and electrode and prevents metal ion dissolution . Therefore, a hybrid approach must be developed to further improve the electrochemical performances of these hierarchically porous micro‐/nanostructure materials.…”

Section: Applications Of Hierarchically Porous Micro‐/nanostructuresmentioning

confidence: 99%

Morphology‐Conserved Transformations of Metal‐Based Precursors to Hierarchically Porous Micro‐/Nanostructures for Electrochemical Energy Conversion and Storage

et al. 2017

Self Cite

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To meet future market demand, developing new structured materials for electrochemical energy conversion and storage systems is essential. Hierarchically porous micro-/nanostructures are favorable for designing such high-performance materials because of their unique features, including: i) the prevention of nanosized particle agglomeration and minimization of interfacial contact resistance, ii) more active sites and shorter ionic diffusion lengths because of their size compared with their large-size counterparts, iii) convenient electrolyte ingress and accommodation of large volume changes, and iv) enhanced light-scattering capability. Here, hierarchically porous micro-/nanostructures produced by morphology-conserved transformations of metal-based precursors are summarized, and their applications as electrodes and/or catalysts in rechargeable batteries, supercapacitors, and solar cells are discussed. Finally, research and development challenges relating to hierarchically porous micro-/nanostructures that must be overcome to increase their utilization in renewable energy applications are outlined.

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“…Among these cathode materials, layered lithium cobalt oxide (LiCoO 2 ) is widely used, for its high theoretical specific capacity (274 mAh g −1 ) and a high working voltage. However, only about 50 % specific capacity is utilized in currently commercialized LiCoO 2 ‐based LIBs under the operation voltage to lower than 4.2 V, because LiCoO 2 operated above 4.2 V is not always satisfactory for the structural stability . The more capacity of LiCoO 2 outputs, the lower stability is.…”

Section: Introductionmentioning

confidence: 99%

A Novel Blending Adhesive in the Fabrication of the Composite Cathode for Lithium‐Ion Batteries

Zhu

Ding

et al. 2017

ChemElectroChem

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In this paper, a novel adhesive prepared by blending lithium‐ion functionalized epoxy resin (ionized oligomer) with poly(vinylidenedifluoride) (PVdF) is used to fabricate the cathode electrode of LiCoO2. The properties of the blending adhesive are studied by Fourier transform infrared spectroscopy, differential scanning calorimeter, and thermogravimetric analysis, and the morphology and performance of the composite cathodes are characterized by using X‐ray photoelectron spectroscopy (XPS), scanning and transmission electron microscopy, electrochemical impedance spectroscopy, and galvanostatic charge‐discharge. With the blended ionized oligomer, the crystallinity behavior of PVdF is decreased effectively, which will be beneficial to the movement of conducting ions. An appropriate amount of ionized oligomer effectively improves the conductivity and charge‐transfer capability of the cathode material. When the amount of ionized oligomer to the PVdF binder is 10 wt%, the LiCoO2‐based composite cathode delivers the highest charge−discharge capacity (178 mAh g−1) and the capacity retention is up to 82.2 % after 100 cycles.

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Maintaining structural integrity of 4.5 V lithium cobalt oxide cathode with fumaronitrile as a novel electrolyte additive

Cited by 112 publications

References 55 publications

Review of Electrolyte Additives for Ternary Cathode Lithium-ion Battery

Review of Electrolyte Additives for Ternary Cathode Lithium-ion Battery

Morphology‐Conserved Transformations of Metal‐Based Precursors to Hierarchically Porous Micro‐/Nanostructures for Electrochemical Energy Conversion and Storage

A Novel Blending Adhesive in the Fabrication of the Composite Cathode for Lithium‐Ion Batteries

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