High-energy-density lithium-ion battery using a carbon-nanotube–Si composite anode and a compositionally graded Li[Ni0.85Co0.05Mn0.10]O2 cathode
- 20 May 2016
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Energy & Environmental Science
- Vol. 9 (6), 2152-2158
- https://doi.org/10.1039/c6ee01134a
Abstract
A fully operational practical Li-rechargeable battery system delivering unprecedented high energy density with excellent cycle life was proposed using the state-of-the-art cathode and anode technologies. Based on the simple ball-milling process, a carbon nanotube (CNT)–Si composite anode with extremely stable long-term cycling, while providing a discharge capacity of 2364 mA h g−1 at a tap density of 1.103 g cm−3, was developed. For the cathode, a two-sloped full concentration gradient (TSFCG) Li[Ni0.85Co0.05Mn0.10]O2 cathode, designed to obtain maximum possible discharge capacity by having a Ni-enriched core and to simultaneously ensure high chemical and thermal stability by having an outer Mn-enriched layer, yielded a discharge capacity of 221 mA h g−1. Integrating the CNT–Si composite and the TSFCG cathode in a full cell configuration, the full cell generated an energy density of 350 W h kg−1 with excellent capacity retention for 500 cycles at 1 C rate, satisfying the energy density limit imposed by the drive range requirement for EVs. The proposed battery system satisfied the demands for energy storage for vehicle applications in terms of energy density, power and cycle life.Keywords
This publication has 34 references indexed in Scilit:
- A Desalination BatteryNano Letters, 2012
- In‐Plane Vacancy‐Enabled High‐Power Si–Graphene Composite Electrode for Lithium‐Ion BatteriesAdvanced Energy Materials, 2011
- The impact of carbon materials on the hydrogen storage properties of light metal hydridesJournal of Materials Chemistry, 2010
- Hydrogen Sorption Cycling Kinetic Stability and Microstructure of Single-Walled Carbon Nanotube (SWCNT) Magnesium Hydride (MgH2) NanocompositesThe Journal of Physical Chemistry C, 2010
- High-energy cathode material for long-life and safe lithium batteriesNature Materials, 2009
- Si Electrodes for Li-Ion Batteries—A New Way to Look at an Old ProblemJournal of the Electrochemical Society, 2008
- Effect of vinylene carbonate (VC) as electrolyte additive on electrochemical performance of Si film anode for lithium ion batteriesJournal of Power Sources, 2007
- Synthesis and Characterization of Li[(Ni0.8Co0.1Mn0.1)0.8(Ni0.5Mn0.5)0.2]O2 with the Microscale Core−Shell Structure as the Positive Electrode Material for Lithium BatteriesJournal of the American Chemical Society, 2005
- Structural Changes in Silicon Anodes during Lithium Insertion/ExtractionElectrochemical and Solid-State Letters, 2004
- Size-dependent melting point depression of nanostructures: Nanocalorimetric measurementsPhysical Review B, 2000