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Zhiqiang Gao

National University of Singapore, Singapore

Title: A dual-carbon phase modified and nanostructured nickel sulfide anode for sodium-ion batteries

Biography

Biography: Zhiqiang Gao

Abstract

Lithium-ion batteries (LIBs) are extensively used from portable electronic appliances such as in mobile phones and laptops to bulky items such as in electric vehicles and large-scale energy storage. The extensive usage of LIBs for various energy storage purposes is due to their high energy and power densities. Their ability to store three times more energy than other batteries increases their competitiveness coupled with the virtual lack of waste during mining. Unfortunately, due to the rapid increase in demand for lithium and the geographical scarcity of it as the bulk availability of lithium reserves is found in South America. Therefore, there is an urgent need for an alternative source of lithium in the manufacture of rechargeable batteries. Sodium ion batteries (SIBs) have attracted considerable attention in recent years due to the high abundance, scattered distribution and low cost of sodium. Based on the concept of nano-confinement reaction, a synthetic strategy is developed to construct an ultrathin carbon film-coated and nanostructured nickel sulfide anchored on carbon nanotubes (CNTs). The synthesis involves direct growth of nickel hydroxide on the CNTs followed by dehydration, sulfidation and carbon coating. When used as an anode material in SIBs, the nickel sulfide-based anode shows a high utilization rate of active material and a favorable specific capacity of 390 mAh g-1. The excellent performance of the nickel sulfidebased anode in SIBs demonstrates the potential of nickel sulfide to be used as the anode material in SIBs when it is engineered to alleviate its structural constraints. In principle, this strategy can be conveniently adapted to engineer other transition metal-based materials for applications in energy storage.

Recent Publications

  1. Han F, Tan C, Gao ZQ (2016) Improving the Specific Capacity and Cyclability of Sodium-Ion Batteries by Engineering a Dual-Carbon Phase-Modified Amorphous and Mesoporous Iron Phosphide. ChemElectroChem 3:1054–1062.
  2. Yang XJ, Gao ZQ (2015) Enzyme-Catalyzed Deposition of Ultrathin Silver shells on Gold Nanorods: A Universal and Highly Efficient Signal Amplification Strategy for Translating Immunoassay into Litmus-type Test. Chemical Communications 51:6928–6931.
  3. Yang XJ, Gao ZQ (2015) Silver/Gold Core-Shell Nanoprism-Based Plasmonic Nanoprobes for Highly Sensitive and Selective Detection of Hydrogen Sulfide. Chemistry- A European Journal 21:988–992.
  4. Lim SY, Shen W, Gao ZQ (2015) Carbon Quantum Dots and Their Applications. Chemical Society Reviews 44:362–381.
  5. Shen W, Gao ZQ (2015) Quantum Dots and Duplex-Specific Nuclease Enabled Ultrasensitive Detection and Serotyping of Dengue Viruses in One Step in a Single Tube. Biosensors and Bioelectronics 65:327–332.