Nissan North America, Inc.

Nagappan Ramaswamy

Taehee Han

Peter Aurora

Rameshwar Yadav

Kenzo Oshihara

Gregory DiLeo

Ellazar Niangar

Xiaoguang Hao

Provided are methods and apparatus for charging a lithium sulfur (Li&#x2014;S) battery. The Li&#x2014;S battery has at least one unit cell comprising a lithium-containing anode and a sulfur-containing cathode with an electrolyte layer there between. One method provides controlled application of voltage pulses at the beginning of the charging process. An application period is initiated after a discharge cycle of the Li&#x2014;S battery is complete. During the application period, voltage pulses are provided to the Li&#x2014;S battery. The voltage pulses are less than a constant current charging voltage. Constant current charging is initiated after the application period has elapsed.

Lithium sulfur battery pulse charging method and pulse waveform

An anode active material for a lithium-ion battery cell comprises low density silicon. The anode active material is provided in an anode for a lithium-ion battery. Also disclosed are methods of making the anode active material.

High capacity, dimensionally stable anode from low-bulk density amorphous silicon for lithium-ion batteries

A cathode for a lithium-sulfur battery cell includes positive active material comprising sulfur and carbon coated onto an electrode substrate and gold nanoparticles affixed to the positive active material and configured to direct growth and deposition of lithium sulfide. A lithium ion battery cell, battery stack and method of making the cathodes are also provided.

Lithium sulfur battery having cathode with nucleation agents

Methods and apparatus are provided for discharging a Li&#x2014;S battery having at least one battery unit comprising a lithium-containing anode and a sulfur-containing cathode with an electrolyte layer there between. One method comprises electrochemically surface treating the sulfur-containing cathode during discharge of the battery. A method of electrochemically surface treating a cathode of a lithium-sulfide battery comprises applying at least one oxidative voltage pulse during a pulse application period while the lithium-sulfur battery discharges and controlling pulse characteristics during the pulse application period, the pulse characteristics configured to affect a morphology of lithium sulfide forming on the sulfur-containing cathode during discharge.

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Farmington Hills, MI, United States of America

Nagappan Ramaswamy