Samsung Electronics Co., Ltd.

Zenlabs Energy, Inc.

Envia Systems, Inc.

Ionblox, Inc.

Sanjeev Sharma

Sujeet Kumar

Subramanian Venkatachalam

Herman Adrian Lopez

Charan Masarapu

Bing Li

Charles A Bowling

Deepak Kumaar K Karthikeyan

Xianyu Iris Li

Pedro A Hernandez-Gallegos

Pedro A Hernández Gallegos

Yogesh Kumar Anguchamy

Jinwoo Hong

A composite coated form of lithium cobalt oxide is described that can achieve improved cycling at higher voltages. Liquid phase and combined liquid and solid phase coating processes are described to effectively form the composite coated powders. The improved cycling positive electrode materials can be effectively combined with either graphitic carbon negative electrode active materials or silicon based high capacity negative electrode active materials. Improved battery designs can achieve very high volumetric energy densities in practical battery formats and with reasonable cycling properties.

Positive electrode active materials with composite coatings for high energy density secondary batteries and corresponding processes

Improved negative electrodes can comprise a silicon based active material blended with graphite to provide more stable cycling at high energy densities. In some embodiments, the negative electrodes comprise a blend of polyimide binder mixed with a more elastic polymer binder with a nanoscale carbon conductive additive. The silicon-based blended graphite negative electrodes can be matched with positive electrodes comprising nickel rich lithium nickel manganese cobalt oxides to form high energy density cells with good cycling properties.

Electrodes with silicon oxide active materials for lithium ion cells achieving high capacity, high energy density and long cycle life performance

Mixed phase complex lithium metal oxides are described with an overall stoichiometry represented by a formula LiNiCoMnO, &#x2212;0.05&#x2266;a&#x2266;0.14, 0.1&#x2266;b&#x2266;0.25, 0&#x2266;c&#x2266;0.2, 0.45&#x2266;d&#x2266;0.8, a+b+c+d=1 and (1+a)/(b+c+d)&#x2266;1.325. The compositions are generally very high in manganese content. The compositions can have x-ray diffractograms and differential capacity profiles suggesting the presence of a layered (LiMnO)&#x2014;layered (LiMetalO)&#x2014;spinel crystal structure. The compositions can exhibit surprisingly low first cycle irreversible capacity losses while maintaining high specific discharge capacities, even at high discharge rates. Stabilizing coatings have been found to further significantly improve performance.

Mixed phase lithium metal oxide compositions with desirable battery performance

A method and system for acknowledging the receipt of a transmitted data stream in a wireless personal area network (WPAN) are disclosed. In one embodiment, a plurality of medium access control (MAC) protocol data units (MPDUs) are transmitted from a transmitting party to a receiving party, and the receiving entity sends a delayed acknowledgment frame to the transmitting party using a bitmap field for each of the fragmented packets instead of using two bytes of an MPDU block for acknowledging each received MPDU. The bitmap field includes a plurality of bitmap values corresponding to the plurality of MPDUs, and each of the plurality of bitmap values is indicative of whether each of the MPDUs is received or not.

Method and system for acknowledging the receipt of a transmitted data stream in a wireless personal area network

A system and method of synchronizing two end terminals using beacon synchronization in a wireless local area network are disclosed. In one embodiment, the method comprises i) communicating with a first terminal via first and second channels and communicating with a second terminal via the first and second channels, ii) transmitting a first series of beacon frames (B, B, B, . . . , B, . . . , and B) and a second series of beacon frames (B, B, B, . . . , B, . . . , and B) over the first and second channels, respectively, iii) obtaining beacon intervals (b, b), wherein brepresents the beacon interval between the ibeacon frame (B) and the (i+1)beacon frame (B) for the first series of beacon frames and brepresents the beacon interval between the ibeacon frame (B) and the (i+1)beacon frame (B) for the second series of beacon frames, iv) calculating the beacon interval offset value (&#x394;b=|b1&#x2212;b2|) and v) setting the interval between the beacon frames (Band (Bin the first channel, and the interval between the beacon frames (Band (B) in the second channel, based on the calculated offset value (&#x394;b) so as to perform beacon synchronization.

Method and system for synchronizing two end terminals using beacon synchronization with multiple channels in a wireless local area network

A method and system for acknowledging the receipt of a transmitted data stream in a wireless local area network (WLAN) are disclosed. One aspect of the invention provides a system and method of acknowledging the receipt of a transmitted data stream in a wireless local area network, wherein the system sends a single acknowledgement to the transmitting party after all of the fragment packets, which belong to a sequence, are received in the receiving party. Another aspect of the invention provides a system and method of confirming the receipt of a transmitted data stream in a wireless local area network, wherein the system transmits a plurality of fragment packets without waiting for an acknowledgement for each fragment packet from the receiving party.

Growing community of inventors

Fremont, CA, United States of America

Sanjeev Sharma