DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: LiH formation and its impact on Li batteries revealed by cryogenic electron microscopy

Journal Article · · Science Advances

Little is known about how evolved hydrogen affects the cycling of Li batteries. Hypotheses include the formation of LiH in the solid-electrolyte interphase (SEI) and dendritic growth of LiH. Here, we discover that LiH formation in Li batteries likely follows a different pathway: Hydrogen evolved during cycling reacts to nucleate and grow LiH within already deposited Li metal, consuming active Li. We provide the evidence that LiH formed in Li batteries electrically isolates active Li from the current collector that degrades battery capacity. We detect the coexistence of Li metal and LiH also on graphite and silicon anodes, showing that LiH forms in most Li battery anode chemistries. Last, we find that LiH has its own SEI layer that is chemically and structurally distinct from the SEI on Li metal. Our results highlight the formation mechanism and chemical origins of LiH, providing critical insight into how to prevent its formation.

Research Organization:
Stanford Univ., CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); National Science Foundation (NSF)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1984661
Journal Information:
Science Advances, Journal Name: Science Advances Journal Issue: 12 Vol. 9; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

References (41)

A short review of failure mechanisms of lithium metal and lithiated graphite anodes in liquid electrolyte solutions journal June 2002
Capturing the swelling of solid-electrolyte interphase in lithium metal batteries journal January 2022
Cryo-STEM mapping of solid–liquid interfaces and dendrites in lithium-metal batteries journal August 2018
High-throughput computational X-ray absorption spectroscopy journal July 2018
The Surface Chemistry of Lithium Electrodes in Alkyl Carbonate Solutions journal January 1994
Electronic structure calculations with the Tran-Blaha modified Becke-Johnson density functional journal November 2010
Ageing mechanisms in lithium-ion batteries journal September 2005
Thermal runaway caused fire and explosion of lithium ion battery journal June 2012
X-ray Photoelectron Spectroscopy Study of Surface Films Formed on Li Electrodes Freshly Prepared in Alkyl Carbonate Solutions journal April 1999
Optimizing Areal Capacities through Understanding the Limitations of Lithium-Ion Electrodes journal November 2015
Electrocatalytic transformation of HF impurity to H2 and LiF in lithium-ion batteries journal April 2018
Commentary: The Materials Project: A materials genome approach to accelerating materials innovation journal July 2013
Minimizing damage during FIB sample preparation of soft materials: FIB SAMPLE PREPARATION OF SOFT MATERIALS journal November 2011
Untersuchungen über den Salzcharakter des Lithiumhydrids journal October 1920
Quantitative and time-resolved detection of lithium plating on graphite anodes in lithium ion batteries journal April 2018
Thermodynamics of open two-phase systems with coherent interfaces: Application to metal–hydrogen systems journal January 2006
Bandgap measurement of thin dielectric films using monochromated STEM-EELS journal August 2009
Atomic structure of sensitive battery materials and interfaces revealed by cryo–electron microscopy journal October 2017
Not so smart? “Smart” drugs increase the level but decrease the quality of cognitive effort journal June 2023
The primary gas phase hydration shell of hydroxide journal March 2023
Neuronal responses to omitted tones in the auditory brain: A neuronal correlate for predictive coding journal June 2023
Identifying the Cause of Rupture of Li-Ion Batteries during Thermal Runaway journal October 2017
Correlating Structure and Function of Battery Interphases at Atomic Resolution Using Cryoelectron Microscopy journal October 2018
Cryo-EM Structures of Atomic Surfaces and Host-Guest Chemistry in Metal-Organic Frameworks journal August 2019
On the possibility of LiH formation on Li surfaces in wet electrolyte solutions journal August 1999
Identification of LiH and nanocrystalline LiF in the solid–electrolyte interphase of lithium metal anodes journal January 2021
Resolving Nanoscopic and Mesoscopic Heterogeneity of Fluorinated Species in Battery Solid-Electrolyte Interphases by Cryogenic Electron Microscopy journal March 2020
Ocean currents magnify upwelling and deliver nutritional subsidies to reef-building corals during El Niño heatwaves journal June 2023
Li plating as unwanted side reaction in commercial Li-ion cells – A review journal April 2018
Corrosion of lithium metal anodes during calendar ageing and its microscopic origins journal March 2021
Operando NMR of NMC811/Graphite Lithium-Ion Batteries: Structure, Dynamics, and Lithium Metal Deposition journal September 2020
Mathematical Modeling of the Lithium Deposition Overcharge Reaction in Lithium-Ion Batteries Using Carbon-Based Negative Electrodes journal January 1999
Cryogenic Electron Microscopy for Energy Materials journal July 2021
Origin of H 2 Evolution in LIBs: H 2 O Reduction vs. Electrolyte Oxidation journal January 2016
The Formation/Decomposition Equilibrium of LiH and its Contribution on Anode Failure in Practical Lithium Metal Batteries journal February 2021
Quantifying inactive lithium in lithium metal batteries journal August 2019
Quantitatively analyzing the failure processes of rechargeable Li metal batteries journal November 2021
Nickel Impurities in the Solid-Electrolyte Interphase of Lithium-Metal Anodes Revealed by Cryogenic Electron Microscopy journal September 2020
TEM Sample Preparation and FIB-Induced Damage journal May 2007
The orientation relationship between lath martensite and austenite in low carbon, low alloy steels journal June 1990
Label-free structural and functional volumetric imaging by dual-modality optical-Raman projection tomography journal March 2023