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Lepidocrocite Titanate–Graphene Composites for Sodium-Ion Batteries

Journal Article · · Journal of Physical Chemistry. C
 [1];  [1];  [1];  [2];  [2];  [3];  [3];  [3];  [1]
  1. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  2. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Molecular Foundry
  3. Stony Brook Univ., NY (United States). Institute for Electrochemically Stored Energy; Brookhaven National Laboratory (BNL), Upton, NY (United States)

To overcome electronic transport issues of layered titanates in sodium-ion batteries, we have designed and synthesized composites of lepidocrocite titanates with reduced graphene oxide through a solution-based self-assembly approach. The parent lepidocrocite titanate (K0.8[Ti1.73Li0.27]O4) was exfoliated by a soft-chemical approach and mechanical shaking. Exfoliated layered titania sheets (LTO) were then combined with reduced graphene oxide (rGO) layers to assemble into composites through flocculation. Countercations (i.e., Mg2+) were used for the self-assembly of negatively charged titania and rGO nanosheets via flocculation. The carbon content in the composites was tuned from 1 to 17% by changing the ratio of titania and rGO sheets in the mixed colloidal suspensions. Electrodes were processed with as-prepared LTO-rGO composites without any carbon additives and tested in sodium half-cell configurations. Mg+-coagulated LTO-rGO composite electrodes deliver higher capacities than electrodes prepared with coagulated titania sheets and 10% acetylene black in sodium half-cells and display good capacity retention after 50 cycles. Electrochemical impedance spectroscopy results indicate lower charge transfer resistance for LTO-14.5%rGO composites than that of coagulated titania sheets with 10% acetylene black. A power law analysis of cells containing the composites indicate a hybrid mechanism consisting of both surface and diffusional processes. A comparison with a similar system, that of dopamine-derived LTO-C heterostructures, reveal significant differences. While capacities showed a strong dependence on carbon content for the dopamine-derived materials, this was not true for the LTO-rGO composites. Instead, the highest capacity was obtained for the 14.5% rGO sample, with a lower value obtained for the 17% rGO sample. A greater proportion of the redox processes were surface rather than diffusional in nature for the LTO-rGO composites as well.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231; SC0012673; AC02-76SF00515
OSTI ID:
1992079
Journal Information:
Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 45 Vol. 126; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (33)

Layer‐Based Heterostructured Cathodes for Lithium‐Ion and Sodium‐Ion Batteries journal February 2019
Extraordinary Performance of Carbon-Coated Anatase TiO 2 as Sodium-Ion Anode journal December 2015
Reversible Sodium Metal Electrodes: Is Fluorine an Essential Interphasial Component? journal May 2019
The Role of Interfaces in Heterostructures journal January 2017
Titanate Anodes for Sodium Ion Batteries journal September 2013
A new phenomenon in sodium batteries: Voltage step due to solvent interaction journal September 2014
Experimental and Computational Investigation of Lepidocrocite Anodes for Sodium-Ion Batteries journal June 2016
Improving Electronic Conductivity of Layered Oxides through the Formation of Two-Dimensional Heterointerface for Intercalation Batteries journal March 2020
Insights into Li + , Na + , and K + Intercalation in Lepidocrocite-Type Layered TiO 2 Structures journal April 2018
Synthesis and Electrochemical Performance of C-Base-Centered Lepidocrocite-like Titanates for Na-Ion Batteries journal August 2018
Self-Assembly-Induced Alternately Stacked Single-Layer MoS 2 and N-doped Graphene: A Novel van der Waals Heterostructure for Lithium-Ion Batteries journal January 2016
Heterostructured Lepidocrocite Titanate-Carbon Nanosheets for Electrochemical Applications journal December 2021
A Highly Reversible Room-Temperature Sodium Metal Anode journal November 2015
Unilamellar Metallic MoS 2 /Graphene Superlattice for Efficient Sodium Storage and Hydrogen Evolution journal March 2018
Genuine Unilamellar Metal Oxide Nanosheets Confined in a Superlattice-like Structure for Superior Energy Storage journal January 2018
Two-Dimensional Unilamellar Cation-Deficient Metal Oxide Nanosheet Superlattices for High-Rate Sodium Ion Energy Storage journal November 2018
Lepidocrocite-type Layered Titanate Structures: New Lithium and Sodium Ion Intercalation Anode Materials journal April 2014
A Mixed Alkali Metal Titanate with the Lepidocrocite-like Layered Structure. Preparation, Crystal Structure, Protonic Form, and Acid−Base Intercalation Properties journal December 1998
A Study of the Hydration of the Alkali Metal Ions in Aqueous Solution journal December 2011
Macroscopic and Strong Ribbons of Functionality-Rich Metal Oxides from Highly Ordered Assembly of Unilamellar Sheets journal September 2015
Dication−Water Interactions:  M 2+ (H 2 O) n Clusters for Alkaline Earth Metals M = Mg, Ca, Sr, Ba, and Ra journal January 1996
Van der Waals heterostructures journal July 2013
Processable aqueous dispersions of graphene nanosheets journal January 2008
Strain engineering of two-dimensional multilayered heterostructures for beyond-lithium-based rechargeable batteries journal July 2020
Protonic titanate derived from Cs x Ti 2−x/2 Mg x/2 O 4 (x = 0.7) with lepidocrocite-type layered structure journal January 2009
Recent advances in the preparation, characterization, and applications of two-dimensional heterostructures for energy storage and conversion journal January 2018
Multiple roles of a heterointerface in two-dimensional van der Waals heterostructures: insights into energy-related applications journal January 2019
Two-dimensional organic–inorganic superlattice-like heterostructures for energy storage applications journal January 2020
Optimization of nonatitanate electrodes for sodium-ion batteries journal January 2020
Three-in-one cathode host based on Nb3O8/graphene superlattice heterostructures for high-performance Li–S batteries journal January 2021
Na2Ti3O7: an intercalation based anode for sodium-ion battery applications journal January 2013
New materials based on a layered sodium titanate for dual electrochemical Na and Li intercalation systems journal January 2013
A layered nonstoichiometric lepidocrocite-type sodium titanate anode material for sodium-ion batteries journal July 2021

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